Flammability Level of various Substances

Last Updated: December 31st, 2022/Views: 2173/2.5 min read/
Online HSE Software
Substance LFL/LEL in %

by volume of air

 UFL/UEL in %

by volume of air

 Flash point Auto-ignition

temperature
Acetaldehyde 4.0 57.0 -39 °C 175 °C
Acetic acid (glacial) 4 19.9 39 °C to 43 °C 463 °C
Acetic anhydride 54 °C
Acetone 2.6–3 12.8–13 -17 °C 465 °C, 485 °C
Acetonitrile 2 °C 524 °C
Acetyl chloride 7.3 19 5 °C 390 °C
Acetylene 2.5 100 Flammable gas 305 °C
Acrolein 2.8 31 -26 °C
Acrylonitrile 3.0 17.0 0 °C
Allyl chloride 2.9 11.1 -32 °C
Ammonia 15 28 11 °C 651 °C
Arsine 4.5–5.1 78 Flammable gas
Benzene 1.2 7.8 -11 °C 560 °C
1,3-Butadiene 2.0 12 -85 °C
Butane, n-butane 1.6 8.4 -60 °C 420–500 °C
n-Butyl acetate, butyl acetate 1–1.7 8–15 24 °C 370 °C
Butyl alcohol, butanol 1 11 29 °C
n-Butanol 1.4 11.2 35 °C 340 °C
n-Butyl chloride, 1-chlorobutane 1.8 10.1 -6 °C
n-Butyl mercaptan 1.4 10.2 2 °C 225 °C
Butyl methyl ketone, 2-hexanone 1 8 25 °C 423 °C
Butylene, 1-butylene, 1-butene 1.98 9.65 -80 °C
Carbon disulfide 1.0 50.0 -30 °C 90 °C
Carbon monoxide 12 75 -191 °C Flammable gas 609 °C
Chlorine monoxide Flammable gas
1-Chloro-1,1-difluoroethane 6.2 17.9 -65 °C Flammable gas
Cyanogen 6.0–6.6 32–42.6 Flammable gas
Cyclobutane 1.8 11.1 -63.9 °C 426.7 °C
Cyclohexane 1.3 7.8–8 -18 °C to -20 °C 245 °C
Cyclohexanol 1 9 68 °C 300 °C
Cyclohexanone 1–1.1 9–9.4 43.9–44 °C 420 °C
Cyclopentadiene 0 °C 640 °C
Cyclopentane 1.5–2 9.4 -37 to -38.9 °C 361 °C
Cyclopropane 2.4 10.4 -94.4 °C 498 °C
Decane 0.8 5.4 46.1 °C 210 °C
Diborane 0.8 88 -90 °C Flammable gas 38 °C
o-Dichlorobenzene, 1,2-dichlorobenzene 2 9 65 °C 648 °C
1,1-Dichloroethane 6 11 14 °C
1,2-Dichloroethane 6 16 13 °C 413 °C
1,1-Dichloroethene 6.5 15.5 -10 °C Flammable gas
Dichlorofluoromethane 54.7 Non flammable,-36.1 °C 552 °C
Dichloromethane, methylene chloride 16 66 Non flammable
Dichlorosilane 4–4.7 96 -28 °C
Diesel fuel 0.6 7.5 >62 °C (143 °F) 210 °C
Diethanolamine 2 13 169 °C
Diethylamine 1.8 10.1 -23 to -26 °C 312 °C
Diethyl disulfide 1.2 38.9 °C
Diethyl ether 1.9–2 36–48 -45 °C 160–170 °C
Diethyl sulfide -10 °C
1,1-Difluoroethane 3.7 18 -81.1 °C
1,1-Difluoroethylene 5.5 21.3 -126.1 °C
Diisobutyl ketone 1 6 49 °C
Diisopropyl ether 1 21 -28 °C
Dimethylamine 2.8 14.4 Flammable gas
1,1-Dimethylhydrazine
Dimethyl sulfide -49 °C
Dimethyl sulfoxide 2.6–3 42 88–95 °C 215 °C
1,4-Dioxane 2 22 12 °C
Epichlorohydrin 4 21 31 °C
Ethane 3 12–12.4 Flammable gas -135 °C 515 °C
Ethanol, ethyl alcohol 3–3.3 19 12.8 °C (55 °F) 365 °C
2-Ethoxyethanol 3 18 43 °C
2-Ethoxyethyl acetate 2 8 56 °C
Ethyl acetate 2 12 -4 °C 460 °C
Ethylamine 3.5 14 -17 °C
Ethylbenzene 1.0 7.1 15–20 °C
Ethylene 2.7 36 490 °C
Ethylene glycol 3 22 111 °C
Ethylene oxide 3 100 -20 °C
Ethyl chloride 3.8 15.4 -50 °C
Ethyl mercaptan
Fuel oil No.1 0.7 5
Furan 2 14 -36 °C
Gasoline (100 octane) 1.4 7.6 < -40 °C (-40 °F) 246–280 °C
Glycerol 3 19 199 °C
Heptane, n-heptane 1.05 6.7 -4 °C 204–215 °C
Hexane, n-hexane 1.1 7.5 -22 °C 225 °C, 233 °C
Hydrogen 4/18.3 75/59 Flammable gas 500–571 °C
Hydrogen sulfide 4.3 46 Flammable gas
Isobutane 1.8 9.6 Flammable gas 462 °C
Isobutyl alcohol 2 11 28 °C
Isophorone 1 4 84 °C
Isopropyl alcohol, isopropanol 2 12 12 °C 398–399 °C; 425 °C
Isopropyl chloride
Kerosene Jet A-1 0.6–0.7 4.9–5 >38 °C (100 °F) as jet fuel 210 °C
Lithium hydride
2-Mercaptoethanol
Methane (natural gas) 5.0 15 Flammable gas 580 °C
Methyl acetate 3 16 -10 °C
Methyl alcohol, methanol 6–6.7 36 11 °C 385 °C; 455 °C
Methylamine 8 °C
Methyl chloride 10.7 17.4 -46 °C
Methyl ether -41 °C
Methyl ethyl ether
Methyl ethyl ketone 1.8 10 -6 °C 505–515 °C
Methyl formate
Methyl mercaptan 3.9 21.8 -53 °C
Mineral spirits 0.7 6.5 38–43 °C 258 °C
Morpholine 1.8 10.8 31–37.7 °C 310 °C
Naphthalene 0.9 5.9 79–87 °C 540 °C
Neohexane 1.19 7.58 -29 °C 425 °C
Nickel tetracarbonyl 2 34 4 °C 60 °C
Nitrobenzene 2 9 88 °C
Nitromethane 7.3 22.2 35 °C 379 °C
Octane 1 7 13 °C
iso-Octane 0.79 5.94
Pentane 1.5 7.8 -40 to -49 °C 260 °C
n-Pentane 1.4 7.8
iso-Pentane 1.32 9.16 420 °C
Phosphine
Propane 2.1 9.5–10.1 Flammable gas 480 °C
Propyl acetate 2 8 13 °C
Propylene 2.0 11.1 -108 °C 458 °C
Propylene oxide 2.9 36
Pyridine 2 12 20 °C
Silane 1.5 98 <21 °C
Styrene 1.1 6.1 31–32.2 °C 490 °C
Tetrafluoroethylene
Tetrahydrofuran 2 12 -14 °C 321 °C
Toluene 1.2–1.27 6.75–7.1 4.4 °C 480 °C; 535 °C
Triethylborane -20 °C -20 °C
Trimethylamine Flammable gas
Trinitrobenzene
Turpentine 0.8 35 °C
Vegetable oil 327 °C (620 °F)
Vinyl acetate 2.6 13.4 -8 °C
Vinyl chloride 3.6 33
Xylenes 0.9–1.0 6.7–7.0 27–32 °C
m-Xylene 1.1 7 25 °C 525 °C
o-Xylene 17 °C
p-Xylene 1.0 6.0 27.2 °C 530 °C

One Comment

  1. hrkhan99
    hrkhan99 August 7, 2018 at 1:04 pm - Reply

    zajak allah

Leave A Comment