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Fire accelerant

A fire accelerant is a , usually a , employed to initiate or enhance the spread of by increasing the rate of . These substances lower the ignition of fuels and provide additional combustible to generate heat for sustaining rapid burning. Common types of fire accelerants include hydrocarbon-based ignitable liquids such as gasoline, kerosene, diesel fuel, and turpentine, which are readily available and highly volatile. Other categories encompass petroleum distillates, oxygenated solvents like methylated spirits, and gaseous accelerants such as propane or butane, though liquids predominate in most applications. Solid materials can also serve as accelerants but are less typical due to their limited volatility. In forensic fire investigations, the detection of accelerant residues is crucial for determining , as these substances often leave characteristic patterns like deep charring or irregular burn trails that differ from natural fire behavior. Analysts employ techniques such as gas chromatography-mass spectrometry to identify accelerant components in fire debris, aiding in legal proceedings. Organizations like the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) train accelerant detection canines to locate ignitable liquids at scenes, enhancing evidence collection efficiency. While frequently associated with criminal , fire accelerants have legitimate uses in controlled settings, such as for safely igniting campfires or barbecues when applied to kindling prior to lighting. However, misuse of potent accelerants like in outdoor fires poses severe risks of and , prompting safety guidelines from agencies like the to restrict their application.

Definition and Properties

Definition

A fire accelerant is any substance or material intentionally introduced to a fire to enhance its development, specifically by increasing the rate of spread, intensity, or duration through mechanisms such as adding volatile , supplying extra oxygen, or reducing the ignition of surrounding materials. According to NFPA 921 (2021), an accelerant is "a or oxidizer, often an ignitible liquid, intentionally used to initiate a or increase the rate of growth or spread of ," primarily in the context of and investigations. This intentional addition distinguishes accelerants from naturally occurring combustibles, as they are deployed to manipulate behavior beyond standard dynamics. Accelerants interact with the fundamental elements of the combustion triangle—fuel, oxygen, and —to disrupt and amplify normal fire progression. By providing highly flammable vapors that serve as additional , accelerants lower the activation energy required for ignition, allowing the fire to propagate more rapidly across surfaces that might otherwise resist burning; alternatively, certain accelerants act as oxidizers to boost oxygen availability, intensifying the and generating excessive that preheats adjacent materials. This interaction transforms a contained into a more aggressive one, often leading to rapid escalation that exceeds the capabilities of typical suppression efforts. Unlike primary fuels, which form the base material sustaining a (such as in a structural ), accelerants function as enhancers that augment the existing load without being the core combustible; for instance, poured over wooden furniture acts as an accelerant to accelerate ignition and spread, whereas the wood itself serves as the primary . Various types of accelerants, including distillates and alcohols, exemplify this role by volatilizing quickly to bridge ignition gaps in heterogeneous fire environments.

Physical and Chemical Properties

Fire accelerants are characterized by key physical properties that facilitate their rapid ignition and in fire scenarios. Volatility, often measured by , is typically high in effective accelerants, enabling the quick formation of flammable vapor-air mixtures at ambient temperatures. This property allows vapors to ignite easily, contributing to accelerated growth. , the lowest temperature at which a produces sufficient vapor to form an ignitable mixture with air, is generally low for accelerants, which include both flammable liquids (below 100°F/38°C, e.g., at -45°F/-43°C) and combustible liquids (100–200°F/38–93°C, e.g., at 126–180°F/52–82°C); this distinguishes them from solid combustibles requiring much higher temperatures for ignition. tends to be relatively low, promoting efficient and sustained release during heating, while is usually low, allowing the to and readily over surfaces without significant resistance. Chemically, accelerants exhibit properties that enhance their combustibility compared to ordinary fuels. Flammability limits, encompassing the lower explosive limit (LEL) and upper explosive limit (UEL), are typically broad, permitting ignition across a wide range of vapor concentrations in air, which supports explosive propagation if conditions align. , the minimum temperature at which occurs without an external spark, is often moderate, facilitating self-sustained burning once initiated. , representing the energy released per unit mass during complete burning, is high, providing substantial thermal output that intensifies intensity and speeds up the involvement of surrounding materials. In fire behavior, these influence observable patterns and . Low and high lead to distinctive pour patterns, where the liquid spreads in trails or pools, resulting in deeper or low-level burning along the flow path due to concentrated deposition. Residue formation varies with completeness; highly volatile accelerants may evaporate and burn with minimal , leaving subtle discoloration or irregular char patterns on substrates, while incomplete burning can produce sooty residues highlighting the accelerant's path. rates are rapid, driven by low points and high , which accelerates vapor buildup and fire spread but can limit residue persistence in well-ventilated conditions. Environmental factors significantly modulate accelerant efficacy. Elevated temperatures enhance and , lowering effective flash points and promoting faster ignition and . Low humidity reduces fuel moisture content, aiding vapor formation and efficiency by minimizing interference. type alters performance: porous materials absorb the liquid, slowing and creating deeper with localized intense burning, whereas non-porous surfaces permit pooling and surface , intensifying initial fire involvement.

Classification of Accelerants

Petroleum-Based Accelerants

Petroleum-based accelerants are ignitable liquids derived from crude oil, consisting of complex mixtures of hydrocarbons that facilitate rapid fire spread when used intentionally. Common examples include gasoline, kerosene, diesel fuel, lighter fluids, and turpentine, each characterized by distinct hydrocarbon profiles. Gasoline comprises primarily alkanes, cycloalkanes, and aromatics with carbon chain lengths from C4 to C12 and a boiling range of 38–204°C, making it highly volatile. Kerosene features straight-chain and branched hydrocarbons mainly in the C10–C16 range, while diesel fuel contains predominantly C10–C24 paraffinic, naphthenic, and aromatic hydrocarbons. Lighter fluids, often based on petroleum naphtha, consist of lighter C5–C10 hydrocarbons similar to those in gasoline but refined for portability. Turpentine, derived from pine resin, is a mixture of terpenes such as alpha-pinene primarily in the C10 range, behaving similarly to light petroleum distillates in flammability. These accelerants are produced through , primarily of crude oil in industrial refineries, which separates components by into distillates like light fractions, middle distillates for , and heavier ones for . Additional treatments such as cracking and reforming enhance yield and quality for specific uses. Their ubiquity stems from everyday applications: and power vehicles, serves as heating fuel in homes, and lighter fluids are standard in households for barbecues and ignition. is commonly used in paints and varnishes. This accessibility contributes to their frequent misuse in . As of 1980, was implicated in approximately 60% of fires, underscoring the dominance of this class in accelerant-related incidents at that time. More recent data from the ATF's 2023 United States Bomb Data Center Incident Summary Report indicate that accelerants overall were involved in about 20.6% (1,120 out of 5,440) of incendiary fire incidents. In fire scenarios, petroleum-based accelerants promote intense through rapid of their lighter components, often resulting in flash fires where ignitable vapors form explosive mixtures with air above the . Unconsumed portions can leave detectable residues, such as iridescent rainbow sheens on water surfaces from thin films, and produce a characteristic pungent, kerosene-like odor from volatile aromatics and alkanes. These traits assist investigators in identifying accelerant use amid . Since the , petroleum-based accelerants have been a staple in due to their low cost and ease of obtainment, aligning with the expansion of federal efforts by the Bureau of Alcohol, Tobacco, Firearms and Explosives starting in 1979.

Oxygenated and Alcohol-Based Accelerants

Oxygenated and alcohol-based accelerants are a class of ignitable liquids characterized by the presence of oxygen-containing functional groups, such as hydroxyl (-OH) in alcohols or carbonyl (C=O) in ketones, which distinguish them from hydrocarbon-based fuels by promoting more efficient oxidation during . These compounds are often used in due to their and ability to produce rapid, residue-minimizing fires that can complicate forensic detection. Unlike petroleum distillates, they typically leave fewer oily remnants, making them suitable for scenarios requiring stealthy ignition. Common examples include (C₂H₅OH), (CH₃OH), and acetone ((CH₃)₂CO). Ethanol and methanol are simple alcohols with a single hydroxyl group attached to a short carbon chain, enabling high and low ignition energy. Acetone features a group between two methyl groups, contributing to its properties and flammability. These structures are identified in forensic via gas chromatography-mass , where oxygenated peaks dominate the total ion chromatogram without interference. These accelerants are sourced from biofuels, industrial solvents, and paints, where their inherent oxygen content—typically 30-50% by weight in alcohols like —facilitates complete by supplying internal oxidant, reducing the need for external oxygen and yielding higher flame temperatures. is produced via of such as corn or for applications, while methanol derives from natural gas synthesis or wood . Acetone emerges as a byproduct of phenol production or oxidation in . In paint formulations, oxygenated solvents like these dissolve resins and evaporate quickly, but their flammability poses risks if ignited during storage or application. In fire behavior, these accelerants exhibit quick ignition due to low flash points—ethanol at 13°C (55°F) and methanol at 12°C (54°F)—allowing ignition from common sources like matches or embers. They produce clean burns with minimal residue, as the oxygen in their molecules promotes near-complete oxidation to CO₂ and H₂O, leaving little or compared to fuels. This is evident in their low extinction coefficients (around 0.37 m⁻¹ for ethanol flames), enabling sustained even in open air. Higher flammability in aqueous mixtures arises from their miscibility with ; for instance, ethanol-water blends up to 50% can still ignite and burn steadily. However, in confined spaces, their vapors form explosive mixtures with air, with lower explosive limits as low as 3.3% for ethanol, potentially leading to overs or deflagrations. Unique risks stem from their toxicity and high water solubility, which can result in environmental persistence and health hazards post-fire. is highly toxic, causing blindness or death via metabolic conversion to , while poses moderate risks including . Both dissolve readily in water ( exceeding 100 g/L), facilitating into soil and during fire suppression, potentially contaminating aquifers with dissolved organics that exceed safe drinking limits. In fire scenes, this solubility hinders detection as residues dilute rapidly but raises remediation challenges. Examples include the 2009 Cherry Valley, , train , where a spill of over 300,000 gallons ignited, causing s and contaminating local waterways with plumes that depleted oxygen and harmed aquatic life; similarly, the 2011 surge in Dutch industrial bio handling incidents led to multiple burns and spill-related alerts.

Common Combustibles as Accelerants

Household and Everyday Materials

Household and everyday materials often serve as improvised accelerants in setting due to their and flammable properties, enabling rapid ignition and spread without specialized equipment. Cooking oils, such as or canola oil commonly used in kitchens, can act as effective accelerants because they have low s around 300–600°F (149–316°C) and produce sustained flames when heated, facilitating propagation on surfaces like countertops or fabrics. Alcohol-based cleaners, including () and some disinfectants, ignite easily at room temperatures below 70°F (21°C) and vaporize quickly, accelerating growth in enclosed spaces. Paint thinners, like spirits found in garages or workshops, are volatile solvents with flash points as low as 100°F (38°C), allowing them to soak into porous materials and create intense, fast-spreading blazes. , a distillate readily available for outdoor , has a low flash point of about 100°F (38°C) and is designed to ignite rapidly, making it a potent unintended accelerant when misused indoors. These materials are ubiquitous in residential settings, contributing to their frequent improvisation in scenarios. Flammable liquids and solvents, including thinners and household cleaners, are present in a significant portion of U.S. households, with the Consumer Product Safety Commission reporting over 62,800 medically treated injuries annually from such products in , underscoring their widespread prevalence and associated risks. Accessibility is heightened by everyday storage in kitchens, bathrooms, and garages, where such materials are commonly found. This ease of access lowers barriers for opportunistic fire setting, particularly in domestic environments. When used as accelerants, these substances produce distinct fire effects, including heavy soot patterns from incomplete and accelerated spread on common surfaces. Cooking oils and paint thinners often result in thick, oily soot residues due to their content, forming irregular, smudged patterns on walls and ceilings that indicate low-oxygen burning conditions, as opposed to cleaner burns from natural fuels. On fabrics and carpets, accelerants like alcohol cleaners or can increase flame spread rates by 2–5 times compared to unignited materials, rapidly consuming synthetic fibers and leading to depths exceeding 1 inch in minutes. In residential cases, such as a 2023 incident in a U.S. home where paint thinner ignited a fatal , investigators noted accelerated fire progression across and , producing extensive soot layering that aided origin determination. Similarly, has been documented in investigations to soak into carpets, creating pour patterns with rapid lateral spread. Misuse of accelerants is notably prevalent in juvenile fire-setting incidents, where curiosity or experimentation drives improvised use of accessible items. According to the U.S. Fire Administration, children and youth under age 18 are responsible for approximately 250,000 annually, with juveniles accounting for about 50% of arrests; recent data up to 2023 shows a persistent trend in youth-involved using everyday materials like oils and solvents, contributing to over $300 million in annual . This pattern highlights the role of household items in non-intentional but destructive , often in homes where such materials are stored insecurely, emphasizing the need for parental on .

Industrial and Specialized Substances

Industrial and specialized substances encompass a range of regulated materials used in , , and heavy machinery, which can inadvertently or intentionally accelerate fires due to their flammable compositions and high content. Unlike common combustibles, these accelerants often feature complex additives for performance enhancement, increasing their hazard potential in industrial settings. Their misuse in amplifies risks, as they enable rapid fire spread across large facilities, complicating suppression efforts and causing extensive damage. Hydraulic fluids, essential for powering industrial equipment such as presses, excavators, and , serve as potent accelerants when compromised. Primarily composed of bases or synthetic esters, these fluids exhibit high flammability, with auto-ignition temperatures around 475°C, allowing them to ignite from hot surfaces or in machinery failures. Production involves refining distillates and blending with anti-wear additives, facilitating their use in high-pressure applications; however, leaks can form mists that propagate fires intensely, as seen in incidents where fueled post-crash blazes exceeding 700°C. In agricultural and contexts, accidental spills near ignition sources have led to rapid escalation, underscoring the need for fire-resistant variants in hazardous environments. Pesticides, formulated for crop protection and industrial , frequently incorporate flammable solvents like hydrocarbons or chlorinated compounds, rendering them effective accelerants. These are manufactured by emulsifying active pesticidal agents with carriers such as or diesel-like distillates to ensure even distribution during application. In storage facilities or during handling, exposure to can trigger , releasing toxic fumes and accelerating fires across storage areas; labels explicitly warn against proximity to flames due to low flash points for many formulations. Their use in intentional exploits this volatility, particularly in rural or settings where large volumes are stockpiled. Incendiary gels, including napalm-like mixtures, represent specialized accelerants with gelling agents such as aluminum naphthenate or palmitate soaps blended with and thickeners, creating adhesive, slow-burning substances. Originally developed for military incendiary devices during , their production entails mixing 4-6% thickener into volatile fuels to form a viscous that adheres to surfaces. In industrial , similar formulations enable delayed ignition and sustained burns, reaching temperatures up to 1,000°C while resisting extinguishment. The fire behavior of these substances is characterized by intense, adherent combustion facilitated by additives; for instance, thickeners in gels promote prolonged release, while solvents in pesticides and oils in hydraulic fluids ensure deep penetration into materials. This results in higher outputs and production compared to unadulterated fuels. Environmentally, residues persist significantly, with petroleum components from or gasoline-based accelerants degrading slowly in —half-lives around 21 days for under optimal conditions—leading to contamination lasting years through and if not remediated. Case studies highlight their role in industrial sabotage, such as fires in warehouses where chemical accelerants like solvent-based mixtures were detected via gas chromatography-mass spectrometry, confirming intentional ignition amid economic disputes, as reviewed in global forensic analyses from 2019-2022. These incidents, including those involving flammable industrial chemicals, demonstrate how such substances exacerbate structural collapse and environmental fallout, emphasizing the forensic challenges in tracing origins.

Detection in Fire Scenes

Visual and Physical Indicators

Visual and physical indicators at fire scenes can provide preliminary evidence of use, guiding investigators toward further . Pour patterns, resulting from the deliberate spreading of , often manifest as unusual low-level burns on floors, heavy at joints in wood or tile flooring, or distinct trailing lines on surfaces where the has flowed before ignition. These patterns differ from typical fire progression by showing accelerated damage at ground level, sometimes with "V" burns or grooves between floorboards where the has soaked in, indicating the presence of an ignitable . Odor and residue serve as additional on-site clues. A persistent petroleum-like smell, such as that of or , may linger even after efforts, as accelerant vapors and unburned components adsorb onto surfaces like carpets, furniture, or walls. Oily or sticky residues, visible as stains on floors or contents, can also remain post-fire, detectable through tactile examination or basic tools like combustible gas indicators, suggesting incomplete of the accelerant. Scene anomalies further suggest accelerant involvement. Multiple, discontinuous ignition points—separate areas of origin unrelated by normal fire spread—point to intentional application across the scene. Rapid fire progression, inconsistent with the available natural fuels and , often produces narrow, sharply defined V-patterns on walls, reflecting the intense, accelerated burning fueled by the accelerant. Remnants of containers, such as cans, bottles, or rags near suspected pour areas, provide direct and should be preserved for analysis. Photographic documentation is essential for capturing these indicators per NFPA 921 guidelines. Investigators should systematically photograph the overall scene, specific patterns, residues, and anomalies from multiple angles, including close-ups with scale references, while maintaining a detailed photo log identifying the photographer, date, and location to ensure evidentiary integrity.

Chemical and Instrumental Analysis

In fire debris analysis, extraction techniques are essential for isolating accelerant residues from complex matrices such as charred materials and substrates. Solvent adsorption methods, particularly using activated charcoal strips (ACS), involve suspending the strips in a sealed container with the debris, allowing vapors to adsorb onto the charcoal during passive headspace concentration at elevated temperatures (typically 60–90°C for 6–24 hours). The adsorbed compounds are then desorbed using a solvent like carbon disulfide for subsequent analysis. Alternatively, headspace sampling captures volatile components by heating the sample in a sealed vessel, either statically or dynamically, to generate a vapor phase that can be directly sampled or concentrated. These techniques minimize matrix interference and preserve volatile ignitable liquid residues (ILRs), with ACS being widely adopted due to its simplicity and effectiveness in forensic protocols. The primary instrumental method for accelerant identification is gas chromatography-mass spectrometry (GC-MS), which separates volatile compounds based on their interaction with a stationary phase and identifies them via mass-to-charge ratios. In GC-MS chromatograms, accelerants exhibit characteristic peak patterns: typically shows a series of closely spaced peaks from C4 to C12 alkanes and aromatics, forming a "hump" envelope due to its lighter profile, while produces broader peaks from C9 to C28, with prominent n-alkanes and branched isomers reflecting its heavier composition. These patterns are compared against ASTM E1618 standards for classification into ignitable liquid classes, enabling differentiation even in degraded samples. GC-MS achieves high sensitivity, with detection limits for common ILR compounds ranging from 0.012 to 0.018 mg/mL in optimized setups, equivalent to approximately 0.1 µL of neat in debris samples. However, challenges arise from fire degradation, where and microbial activity can alter or volatilize residues, reducing recoverable ILRs to parts per million levels and complicating . Extraction efficiency and instrument tuning are critical to overcoming these limits, as incomplete recovery from heavy substrates can lead to false negatives. Advances in the 2020s have introduced portable GC-MS units for field deployment, such as rapid GC-MS systems integrated with (SPME), which reduce time to under 10 minutes while maintaining laboratory-grade resolution. These devices, weighing under 20 kg, enable on-site screening of accelerants, improving response times in investigations by confirming residues before lab transport and minimizing contamination risks. Their adoption has been supported by validations showing comparable sensitivity to benchtop models, facilitating faster evidentiary decisions. Recent advancements as of include deep models for automatic of GC-MS data, enabling high-throughput of ignitable liquids.

Forensic and Legal Applications

Role in Arson Investigations

Accelerants play a significant role in investigations, as their presence in approximately 21% of incendiary incidents indicates intentional ignition and aids in distinguishing from accidental causes. According to the 2023 Bomb Data Center Incident Report by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), out of 5,440 reported incendiary fires, 1,120 involved accelerants, highlighting their prevalence in motive analysis such as or . This statistical context underscores how accelerant evidence influences the overall investigative strategy, prompting deeper scrutiny of potential suspects and patterns. In the investigative workflow, accelerant evidence is integrated into origin-and-cause determination following the systematic principles outlined in NFPA 921: Guide for Fire and Explosion Investigations, as detailed in Kirk's Fire Investigation by De Haan and Icove. Investigators begin with scene assessment to identify potential irregular burn patterns or low-point burns that may suggest the use of accelerants, subject to laboratory confirmation, then proceed to hypothesis testing through physical and chemical analysis to confirm the fire's ignition source. This process ensures that accelerant findings contribute to establishing the fire's point of origin, ruling out natural or accidental causes, and aligning with the scientific method emphasized in forensic fire investigation standards. The evidence chain for accelerants demands rigorous collection protocols to maintain , starting with the use of , vapor-tight containers such as metal cans or jars to capture from suspected pour areas without . Preservation involves sealing samples immediately, labeling them with details like location, date, and collector's name, and storing volatile items in cool, dry conditions or freezing soil-based samples to prevent or degradation during transport to laboratories. Testimony preparation requires investigators to document the chain of custody meticulously, including transfer logs, to demonstrate the reliability of evidence in linking the fire's cause to human intervention. Case linkage often relies on matching accelerant signatures, such as unique chemical additives or hydrocarbon profiles in , to suspects' possessions like vehicles or containers. Gas chromatography-mass spectrometry (GC-MS) analysis can identify specific markers, such as proprietary fuel additives, allowing investigators to compare scene residues with samples from a suspect's property, thereby establishing direct evidentiary ties. This technique has been pivotal in cases where , combined with profiling, corroborates witness statements or alibis, strengthening the prosecutorial narrative.

Evidentiary Standards and Challenges

In courts, the admissibility of fire accelerant evidence, particularly from gas chromatography-mass spectrometry (GC-MS) analysis, is governed by the established in Daubert v. Merrell Dow Pharmaceuticals, Inc. (1993), which requires scientific testimony to be reliable and relevant. This involves assessing factors such as testability, , known error rates, and general acceptance in the . For GC-MS results in fire debris, courts evaluate the method's error rate—typically low at under 1% for positive identifications when properly controlled—but scrutinize potential interpretive biases, such as distinguishing accelerant residues from environmental hydrocarbons. A primary challenge in evidentiary use of accelerant detection is the risk of false positives arising from background hydrocarbons naturally present in fire scenes, such as those from plastics, paints, or , which can mimic ignitable liquid patterns in GC-MS chromatograms. Additionally, accelerant residues degrade over time through , microbial breakdown, or oxidation, potentially reducing volatile components like gasoline's lighter fractions within hours to days post-fire, complicating recovery from older scenes. Cross-contamination risks further undermine reliability, as seen in debris where equipment or personnel transfer residues between samples, leading to erroneous identifications in up to 10-20% of uncontrolled cases. Fire investigators providing expert testimony must demonstrate qualifications, often through certifications like the International Association of Investigators' Certified Fire Investigator (IAAI-CFI), which requires documented , , and peer-reviewed examinations to establish competency in scene analysis and chemical interpretation. In defense strategies, rebuttal often involves Daubert motions to exclude prosecution experts by highlighting methodological flaws, such as inadequate blanks for contamination or failure to account for products, or by introducing counter-experts to argue alternative non- explanations for hydrocarbon profiles. Evolving environmental factors, including , pose new challenges by accelerating in prolonged, high-temperature scenarios of the , where intensified and heat in fire-prone regions can dissipate volatile residues before sampling, as observed in intensified North American blazes. Internationally, evidentiary standards vary; in the , the ENFSI Best Practice Manual for Fire and Explosion Investigation emphasizes standardized protocols for collection and analysis to ensure cross-border admissibility, differing from U.S. Daubert by prioritizing ISO 17025 accreditation over judicial gatekeeping.

References

  1. [1]
    [PDF] appendix a glossary of investigative and legal terminology - DNRC
    Accelerant - material ( usually a flammable liquid) used to initiate or increase the spread of a fire.
  2. [2]
    Campfires (U.S. National Park Service)
    Apr 17, 2017 · An accelerant is an extremely flammable liquid or mixture, like lighter fluid, that is used to speed up starting a fire. Use only lighter fluid ...
  3. [3]
    Fire Debris Analysis - Forensic Science Ireland
    Petrol and other petroleum distillates are among the most commonly detected accelerants in arson cases because they are readily available, easy to obtain in ...
  4. [4]
    SFR Guidance - Ignitable Liquids // Cellmark
    These fall into several main groups typified by petrol, petroleum distillates, other oxygenated products such as methylated spirits and specialist solvents.
  5. [5]
    [PDF] Accelerants - Salem Press
    Accelerants are substances, often ignitable liquids, used to increase the rate and spread of fires, often indicating arson.
  6. [6]
    Was Flammable Liquid Used as an Accelerant?
    Evidence of the use of a flammable liquid in a fire can be established by an examination of burn patterns, charring, melted metals, heat colors, glass.Missing: types | Show results with:types
  7. [7]
    Determination of Ignitable Liquids in Fire Debris: Direct Analysis by ...
    May 13, 2016 · In many arson cases accelerants such as ignitable liquids are used to initiate or accelerate a fire. · Gas chromatography-mass spectrometry is ...Missing: definition | Show results with:definition
  8. [8]
    [PDF] National Response Team | ATF
    ATF's unique training. • methodology enables accelerant detection canines to find a vari- ety of ignitable liquids that could be used to initiate a fire. It ...
  9. [9]
    [PDF] NFPA Glossary of Terms - Sava Fire Equipment Inc.
    ... Accelerant. A fuel or oxidizer, often an ignitible liquid, intentionally used to initiate a fire or increase the rate of growth or spread of fire. 921 (2021).
  10. [10]
    Accelerants in arson cases | Research Starters - EBSCO
    Accelerants are substances, mainly ignitable liquids, used to increase fire speed and spread, often indicating arson. Common ones include gasoline, lighter ...Missing: legitimate | Show results with:legitimate
  11. [11]
    Accelerant | NIST - National Institute of Standards and Technology
    Jan 15, 2025 · a fuel or oxidizer, often an ignitable liquid, intentionally used to initiate a fire or increase the rate of growth or spread of fire.
  12. [12]
    The Fire Triangle
    Oxygen, heat, and fuel are frequently referred to as the "fire triangle." Add in the fourth element, the chemical reaction, and you actually have a fire " ...
  13. [13]
    Accelerants and fire investigations - Croner-i
    The properties of some ignitable liquids make them dangerous accelerants. Many ignitable liquids have high vapour pressures, low flash points and a relatively ...
  14. [14]
    [PDF] Chapter 7 - INCENDIARISM
    Accelerants with high vapor pressure like alcohol or acetone tend to "flash and scorch" a surface, whereas accelerants with higher boiling components like ...
  15. [15]
    Flammable Liquid Properties - Princeton EHS
    Any liquid with a flashpoint less than 100 o F is considered to be a flammable liquid. A liquid with a flashpoint between 100 o F and 200 o F is combustible.
  16. [16]
    Flash Point - ChemSafetyPro.COM
    Jan 13, 2016 · Flash point is the lowest temperature at which a chemical can vaporize to form an ignitable mixture in air. A lower flash point indicates higher flammability.
  17. [17]
    [PDF] The Chemistry of Combustion and Arson - Higher Education | Pearson
    Just as the temperature of liquid water (not steam) cannot exceed 100°C, the temperature of the liquid accelerant cannot exceed its boiling point.
  18. [18]
    [PDF] Fire Dynamics and Forensic Analysis of Liquid Fuel Fires
    Feb 18, 2011 · ABSTRACT. Liquid fuel spill/pool fires represent the initiating fire hazard in many applications ranging from accidents at industrial plants ...
  19. [19]
    [PDF] Fire Investigation: Fire Dynamics and Modeling-Student Manual
    Gasoline has an auto-ignition temperature of 500 C, a flammability range of ... Fire Chemistry: Molar Weight, Lower oxygen limit, heat of combustion, initial fuel.
  20. [20]
    Fuels > Flammability Characteristcs -- Detailed Definitions
    Autoignition temperature: The lowest temperature at which combustion material ignites in air without a spark of flame.Missing: accelerants | Show results with:accelerants
  21. [21]
    [PDF] Lecture 7 Flame Extinction and Flamability Limits
    The flammability limit of most hydrocarbons corresponds to a heat of combustion close to 12.5 kcal. This is essentially Le Chatelier's famous mixing rule ...
  22. [22]
    [PDF] Chapter 4 Part 1 Fire Effects and Fire Patterns
    The pattern is often referred to as a pour, pool or irregular burn pattern. Although these patterns can be created by ignitable liquids they can also be caused ...
  23. [23]
    Understanding Char in Fire Investigation: Significance, Analysis ...
    Dec 15, 2024 · Char forms through a process called pyrolysis, where organic material decomposes under heat in the absence of oxygen. During pyrolysis, volatile ...
  24. [24]
    [PDF] Prediction and Preliminary Standardization of Fire Debris ...
    We discuss a recently introduced method that can provide predicted evaporation patterns for ignitable liquids as a function of temperature. The method is a ...Missing: pour | Show results with:pour
  25. [25]
    Fire as a fundamental ecological process: Research advances and ...
    Apr 18, 2020 · Fire weather: Weather conditions that influence fire ignition, fuel conditions and fire behaviour, including wind, atmospheric temperature, ...Missing: accelerant efficacy
  26. [26]
    Quantifying the effects of environmental factors on wildfire burned ...
    Sep 28, 2020 · For the summer fire season, under strict fire regulations, environmental factors such as high temperature or low relative humidity can play a ...Missing: substrate accelerant
  27. [27]
    Interpol review of fire debris analysis and fire investigation 2019–2022
    This review covers research in the areas of fire debris analysis and fire investigations since the 19th International Forensic Science Managers Symposium in ...Missing: pour | Show results with:pour<|separator|>
  28. [28]
    [PDF] Ignitable Liquid Residue Distribution in Pour Patterns as Affected by ...
    Higher percentages of gasoline residues were found compared to kerosene residues after a 70% burn of the same substrate and pour pattern.
  29. [29]
    [PDF] 2.0 petroleum products - NY.Gov
    Briefly speaking, gasoline is a mixture of volatile hydrocarbons with a carbon number of four to twelve, has a boiling range of 38° to 204°C (100°- 400°F), and ...
  30. [30]
    https://www.marshall.edu/forensics/files/2012/09/Greely-Poster-Final-2-1-12.pdf
  31. [31]
    Petroleum Distillate - an overview | ScienceDirect Topics
    Background. Petroleum distillates are colorless liquid petrochemical mixtures with kerosene-like odor and a boiling range of 90–240 °C containing hydrocarbons ...<|separator|>
  32. [32]
    Oil and Petroleum Products Explained: Refining Crude Oil - EIA
    Petroleum refineries convert (refine) crude oil into petroleum products for use as fuels for transportation, heating, paving roads, and generating electricity.
  33. [33]
    Oil Refineries: How They Work and Their Key Functions - Investopedia
    Nov 5, 2025 · Oil refineries transform crude oil into various products like gasoline, diesel, and kerosene through distillation. Refining is a downstream ...
  34. [34]
    [PDF] RESIDUES OF FIRE ACCELERANT CHEMICALS VOLUME I: RISK ...
    Oct 17, 2002 · This report summarizes the results of quantitative human health and ecological risk assessments of chemical residues in the environment from ...
  35. [35]
    [PDF] Water Sheen Facts - Gov.bc.ca
    The colour of the sheen helps to indicate its origin. Refined petroleum products often have a rainbow sheen that fades to a silvery colour at the edges.
  36. [36]
    Detection of Gasoline as an Accelerant - Office of Justice Programs
    About 60 percent of all arson fires are started with gasoline, and this substance leaves clues at the fire site. Gasoline which is poured on the floor ...
  37. [37]
    Arson: The Business of ATF
    Apr 29, 2016 · It provides the facilities, equipment and staff to work on important issues involving fire scene reconstruction, validation of fire pattern ...Arson: The Business Of Atf · A Brief History Of How Atf... · Interpreting The Law
  38. [38]
    None
    ### Summary of Classification of Ignitable Liquids (Oxygenated and Alcohol-Based Accelerants)
  39. [39]
    Study on combustion, performance and exhaust emissions of ... - NIH
    Biofuels has shown a popular replacement for fossil fuels due to their low emission contaminants, renewability and oxygenation. Alcohol as an alternative fuel ...
  40. [40]
    Biofuel Basics - Department of Energy
    Biodiesel is a liquid fuel produced from renewable sources, such as new and used vegetable oils and animal fats and is a cleaner-burning replacement for ...Missing: solvents paints accelerants
  41. [41]
    Biofuels and Their Blends—A Review of the Effect of Low Carbon ...
    Biofuels generally exhibit poorer combustion performance in IC engines compared to fossil fuels due to their high viscosity and low lower heating value.
  42. [42]
    Sample preparation for the analysis of fire debris – Past and present
    Sep 8, 2018 · ... oxygenated solvents which may be used as accelerants. The needle in which the fiber is positioned is inserted into the container and then ...
  43. [43]
    Flammable Liquids Examples And The Risks They Pose
    Nov 30, 2024 · Ethanol: Found in alcoholic beverages, fuel additives, and cleaning products, ethanol is highly flammable with a flash point of 55°F (13°C).Missing: oxygenated accelerants structures
  44. [44]
    Ethanol and Methanol Burn Risks in the Home Environment - MDPI
    Oct 26, 2018 · Methanol and ethanol burns very clean and is associated with very low extinction coefficients, typically about 0.37 [31]. This is an order of ...
  45. [45]
    [PDF] Denatured Ethanol Spills - Office of Response and Restoration
    The following plot shows the toxicity test results for a wide range of species, indicating that ethanol is practically nontoxic to most aquatic species for ...Missing: solubility accelerants scenes
  46. [46]
    [PDF] LARGE VOLUME ETHANOL SPILLS - Mass.gov
    toxicity or oxygen depletion) and both they and the ethanol itself can be toxic to water treatment bio-remediation systems in high concentration. In ...
  47. [47]
    [PDF] The Subsurface Fate of Ethanol
    □ Ethanol is not expected to be a significant groundwater conta- minant for extended periods. Although we do not expect ethanol to contaminate groundwater.
  48. [48]
    Ethanol and the Fire Service: Ethanol Incidents
    Mar 28, 2025 · A freight train derailed at a rail crossing in Cherry Valley, IL. 19 cars derailed, all of which contained ethanol; 13 of the cars released ethanol, which ...
  49. [49]
    Aetiology of bioethanol related burn accidents: A qualitative study
    While in 2010 2 patients with bioethanol incidents were admitted to a Dutch burn centre, this number suddenly rose to 29 victims in the next year 2011 [9]. We ...Missing: industrial post-
  50. [50]
    https://www.epa.gov/sites/default/files/2015-03/documents/ll36eth.pdf
  51. [51]
    8 Flammable Liquids Lying Around Your House | UL Solutions
    Gasoline, paint thinner and turpentine. One of the most dangerous liquids in the home, gasoline starts approximately 8,000 home fires annually. One reason is ...Missing: cooking | Show results with:cooking
  52. [52]
    10 Most Common Flammable Liquids in the Home
    Feb 1, 2025 · Common household liquids like cooking oils, cleaners, and even hand sanitizer can ignite and spread flames if mishandled.Missing: accelerants charcoal
  53. [53]
    [PDF] Hazard Screening Report Home and Family Maintenance Products
    This report shows an index of the number of the overall injuries and deaths associated with household chemicals. A summary of the injury, death and cost data ...Missing: prevalence | Show results with:prevalence
  54. [54]
    [PDF] Household Hazardous Products and Hazardous Waste
    Hazardous products generally fall into five catego- ries: automotive, cleaning and polishing, paint and related solvents, pesticides, and miscellaneous items. ( ...
  55. [55]
    Use of damage in fire investigation: a review of fire patterns analysis ...
    May 28, 2015 · Fire investigators have historically relied upon damage as a means to conclude where a fire originated. This review evaluates the historical and current ...
  56. [56]
    Burning Rate of Liquid Fuel on Carpet (Porous Media) - ResearchGate
    Aug 9, 2025 · In this study, a heat and mass transfer theory was first developed to analyze the burning process of liquid on carpet, and then several small- ...Missing: household | Show results with:household
  57. [57]
    [PDF] A forensic analysis of the paint thinner explosion incident
    Jul 25, 2023 · This case study examines a paint thinner explosion incident that occurred in a residential house, resulting in the loss of life, injuries and ...
  58. [58]
    Youth Firesetting - U.S. Fire Administration
    Resources for fire departments and messages to share with parents and caregivers to prevent children from experimenting with fire.
  59. [59]
    Juvenile Firesetting | Dinwiddie County, VA - Official Website
    Juvenile Firesetter Statistics. Children set more than 250,000 fires annually. Over 40% of juvenile firesetters are under age 5, and 70% are under age 10.
  60. [60]
    Juvenile Firesetting and Arson
    FBI 1995 statistics indicate that juveniles accounted for 52 percent of arson arrests. During the 1980s, the rate of juvenile arrests for arson remained ...
  61. [61]
    Hydraulic Fluid as a Fire Source | SKYbrary Aviation Safety
    Most hydraulic fluids are combustible and a compromised hydraulic system, in combination with an ignition source, can lead to a fire.
  62. [62]
    Pesticide Emergencies: Fires and Spills - UF/IFAS EDIS
    Flammable pesticides typically include the following precaution on the label: "Do not use or store near heat or open flame." These warnings will be found in the ...
  63. [63]
    Napalm | Incendiary Weapon, Vietnam War, Firebombing - Britannica
    Oct 17, 2025 · Napalm is also employed in a pyrotechnic gel containing gasoline and less-volatile petroleum oil, powdered magnesium, and sodium nitrate; this ...
  64. [64]
    [PDF] Fire investigation handbook - NIST Technical Series Publications
    The Handbook is a reference tool designed to be used by the beginning or by the experienced fire investigator. How each person.
  65. [65]
    [PDF] Fire Investigation: First Responders-Student Manual
    C. One example is NFPA 921, Guide for Fire and Explosion Investigations, published by the NFPA. Students will use this reference at length during ...
  66. [66]
    Solvent Desorption of Charcoal Strips (DFLEX®) in the Analysis of ...
    Nov 22, 2013 · One of the most common methods for the analysis of accelerant residues in fire debris is by passive headspace adsorption onto activated charcoal ...
  67. [67]
    Fire Debris Analysis: Forensics Cousin of Fuels Analysis
    Jul 20, 2020 · Fire debris analysis is often done by GC-MS so that chromatograms can be matched for their general patterns and MS can be used to identify ...
  68. [68]
    Rapid GC-MS as a Screening Tool for Forensic Fire Debris Analysis
    This work focuses on the development of a method for ignitable liquid analysis using rapid GC-MS. A sampling protocol and temperature program were developed.
  69. [69]
    Rapid GC–MS as a Screening Tool for Forensic Fire Debris Analysis
    Jul 6, 2022 · Using the optimized method for analysis, the limits of detection for compounds commonly found in ignitable liquids ranged from 0.012 mg/mL to ...
  70. [70]
    Recent advancements and moving trends in chemical analysis of ...
    Typically, accelerants are not present in accidental fires, therefore the presence of accelerants can strongly suggest a fire of suspicious origin [7].
  71. [71]
    Sensitive and Representative Extraction of Petroleum-Based ...
    May 24, 2022 · We present an optimised SPME extraction method suited to confirmatory analysis of canine-selected exhibits. The method is non-destructive and non-exhaustive.
  72. [72]
    Implementation of SPME and Rapid GC-MS as a Screening ...
    Sep 19, 2023 · In this work, solid phase microextraction (SPME) was implemented with rapid GC-MS for ignitable liquid analysis for a faster, more sensitive screening approach.
  73. [73]
    [PDF] Enhancing Fire Scene Investigations Through New Technology
    The sensitivity of the ppbRAE 3000® used here can measure hydrocarbons down to a few parts per billion (ppb).[1] This is contrasted with the lower detection ...
  74. [74]
    [PDF] 2023 United States Bomb Data Center (USBDC) Arson Incident ...
    (U) Of the 5,440 Incendiary fire-related incidents reflected in BATS, there were 1,120 Incendiary fires listed as involving an “Accelerant,” along with 2,291 ...
  75. [75]
    https://chemrxiv.org/engage/chemrxiv/article-details/6508935bb6ab98a41caeed8e
  76. [76]
    A Guide for Investigating Fire and Arson - National Institute of Justice
    May 31, 2009 · This handbook is intended as a guide to recommended practices for the collection and preservation of evidence at fire/arson scenes.
  77. [77]
    Investigating Arson Attacks Using Multidimensional Gas ...
    Sep 7, 2020 · Imagine you are investigating an arson attack and have identified that a particular accelerant was used. There is a suspect in custody and ...
  78. [78]
    [PDF] Chapter 5 - COLLECTION AND PRESERVATION OF FIRE EVIDENCE
    In cases where only a small quantity of accelerant is used, the investigator should search the area of origin for an unusual pattern of localized damage. Some ...<|separator|>
  79. [79]
    [PDF] Fire Debris Admissibility
    Jan 1, 2022 · Per Daubert, scientific evidence has four criteria or prongs that can be considered: 1) Testability. 2) Peer Review. 3) Error Rate a ...
  80. [80]
    [PDF] Scientific and Legal Developments in Fire and Arson Investigation ...
    Jul 12, 2013 · Here, he argued that the lack of GC-MS evidence of an accelerant should not be interpreted as evidence of its absence. Vasquez stressed that ...
  81. [81]
    Unconfirmed accelerants: Controversial evidence in fire investigations
    Aug 9, 2025 · The possibility of false positives means that in a ... accelerants and distinguish them from pyrolysis products or background hydrocarbons.
  82. [82]
    Avoiding False-Positive Results in Fire Investigations - J.S. Held
    The presence of hydrocarbon contaminants may lead to a positive test result, even in the absence of any ignitable liquid residue within the sample itself. This ...Missing: detection degradation
  83. [83]
    Cross-Contamination of Ignitable Liquid Residues on Wildfire Debris ...
    Sep 11, 2023 · The potential for false positive identification of ILR is notably present due to cross-contamination. Compound transmission for a mid-range ILR ...<|separator|>
  84. [84]
    IAAI-CFI® | firearson.com
    The IAAI-CFI® qualification is a standardized evaluation of a fire investigator's training and expertise.
  85. [85]
    Navigating Daubert Challenges in Fire Investigations - Blazestack
    Dec 16, 2024 · This legal standard sets the rules for determining whether expert testimony is admissible. Judges are tasked with evaluating the reliability ...Missing: GC- MS<|separator|>
  86. [86]
    How Can You Challenge Arson Evidence in Seattle Criminal Court?
    Sep 1, 2024 · Arson evidence can be challenged by questioning eyewitness testimonies, forensic evidence, and using expert witnesses to provide alternative ...Missing: rebuttal | Show results with:rebuttal<|separator|>
  87. [87]
    Impacts of changes in climate extremes on wildfire occurrences in ...
    Dec 15, 2023 · Additionally, high temperatures will lead to high evaporation and increase the load of combustible materials, which could contribute to the ...Missing: scenes accelerant 2020s
  88. [88]
    [PDF] Best Practice Manual for the Investigation of Fires and Explosions
    This work brings together current available knowledge and material and is the result of an extensive study of current practice used by forensic science.Missing: variations | Show results with:variations