Flammability Level of various Substances

SubstanceL, FL/LEL in % by volume of air, UFL/UEL in %by volume of air
Flash point, and Auto-ignitiontemperature
Acetaldehyde: 4.0, 57.0, -39 °C and 175 °C respectively
Acetic acid (glacial): 4, 19.9, 39 °C to 43 °C and 463 °C
Acetic anhydride: 54 °CAcetone2.6–312.8–13-17 °C465 °C, 485 °CAcetonitrile2 °C524 °CAcetyl chloride7.3195 °C390 °CAcetylene2.5100Flammable gas305 °CAcrolein2.831-26 °CAcrylonitrile3.017.00 °CAllyl chloride2.911.1-32 °CAmmonia152811 °C651 °CArsine4.5–5.178Flammable gasBenzene1.27.8-11 °C560 °C1,3-Butadiene2.012-85 °CButane, n-butane1.68.4-60 °C420–500 °Cn-Butyl acetate, butyl acetate1–1.78–1524 °C370 °CButyl alcohol, butanol11129 °Cn-Butanol1.411.235 °C340 °Cn-Butyl chloride, 1-chlorobutane1.810.1-6 °Cn-Butyl mercaptan1.410.22 °C225 °CButyl methyl ketone, 2-hexanone1825 °C423 °CButylene, 1-butylene, 1-butene1.989.65-80 °CCarbon disulfide1.050.0-30 °C90 °CCarbon monoxide1275-191 °C Flammable gas609 °CChlorine monoxideFlammable gas1-Chloro-1,1-difluoroethane6.217.9-65 °C Flammable gasCyanogen6.0–6.632–42.6Flammable gasCyclobutane1.811.1-63.9 °C426.7 °CCyclohexane1.37.8–8-18 °C to -20 °C245 °CCyclohexanol1968 °C300 °CCyclohexanone1–1.19–9.443.9–44 °C420 °CCyclopentadiene0 °C640 °CCyclopentane1.5–29.4-37 to -38.9 °C361 °CCyclopropane2.410.4-94.4 °C498 °CDecane0.85.446.1 °C210 °CDiborane0.888-90 °C Flammable gas38 °Co-Dichlorobenzene, 1,2-dichlorobenzene2965 °C648 °C1,1-Dichloroethane61114 °C1,2-Dichloroethane61613 °C413 °C1,1-Dichloroethene6.515.5-10 °C Flammable gasDichlorofluoromethane54.7Non flammable,-36.1 °C552 °CDichloromethane, methylene chloride1666Non flammableDichlorosilane4–4.796-28 °CDiesel fuel0.67.5>62 °C (143 °F)210 °CDiethanolamine213169 °CDiethylamine1.810.1-23 to -26 °C312 °CDiethyl disulfide1.238.9 °CDiethyl ether1.9–236–48-45 °C160–170 °CDiethyl sulfide-10 °C1,1-Difluoroethane3.718-81.1 °C1,1-Difluoroethylene5.521.3-126.1 °CDiisobutyl ketone1649 °CDiisopropyl ether121-28 °CDimethylamine2.814.4Flammable gas1,1-DimethylhydrazineDimethyl sulfide-49 °CDimethyl sulfoxide2.6–34288–95 °C215 °C1,4-Dioxane22212 °CEpichlorohydrin42131 °CEthane312–12.4Flammable gas -135 °C515 °CEthanol, ethyl alcohol3–3.31912.8 °C (55 °F)365 °C2-Ethoxyethanol31843 °C2-Ethoxyethyl acetate2856 °CEthyl acetate212-4 °C460 °CEthylamine3.514-17 °CEthylbenzene1.07.115–20 °CEthylene2.736490 °CEthylene glycol322111 °CEthylene oxide3100-20 °CEthyl chloride3.815.4-50 °CEthyl mercaptanFuel oil No.10.75Furan214-36 °CGasoline (100 octane)1.47.6< -40 °C (-40 °F)246–280 °CGlycerol319199 °CHeptane, n-heptane1.056.7-4 °C204–215 °CHexane, n-hexane1.17.5-22 °C225 °C, 233 °CHydrogen4/18.375/59Flammable gas500–571 °CHydrogen sulfide4.346Flammable gasIsobutane1.89.6Flammable gas462 °CIsobutyl alcohol21128 °CIsophorone1484 °CIsopropyl alcohol, isopropanol21212 °C398–399 °C; 425 °CIsopropyl chlorideKerosene Jet A-10.6–0.74.9–5>38 °C (100 °F) as jet fuel210 °CLithium hydride2-MercaptoethanolMethane (natural gas)5.015Flammable gas580 °CMethyl acetate316-10 °CMethyl alcohol, methanol6–6.73611 °C385 °C; 455 °CMethylamine8 °CMethyl chloride10.717.4-46 °CMethyl ether-41 °CMethyl ethyl etherMethyl ethyl ketone1.810-6 °C505–515 °CMethyl formateMethyl mercaptan3.921.8-53 °CMineral spirits0.76.538–43 °C258 °CMorpholine1.810.831–37.7 °C310 °CNaphthalene0.95.979–87 °C540 °CNeohexane1.197.58-29 °C425 °CNickel tetracarbonyl2344 °C60 °CNitrobenzene2988 °CNitromethane7.322.235 °C379 °COctane1713 °Ciso-Octane0.795.94Pentane1.57.8-40 to -49 °C260 °Cn-Pentane1.47.8iso-Pentane1.329.16420 °CPhosphinePropane2.19.5–10.1Flammable gas480 °CPropyl acetate2813 °CPropylene2.011.1-108 °C458 °CPropylene oxide2.936Pyridine21220 °CSilane1.598<21 °CStyrene1.16.131–32.2 °C490 °CTetrafluoroethyleneTetrahydrofuran212-14 °C321 °CToluene1.2–1.276.75–7.14.4 °C480 °C; 535 °CTriethylborane-20 °C-20 °CTrimethylamineFlammable gasTrinitrobenzeneTurpentine0.835 °CVegetable oil327 °C (620 °F)Vinyl acetate2.613.4-8 °CVinyl chloride3.633Xylenes0.9–1.06.7–7.027–32 °Cm-Xylene1.1725 °C525 °Co-Xylene17 °Cp-Xylene1.06.027.2 °C530 °C