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气体爆炸上限/下限(LEL/UEL)
燃烧和爆炸发生，必须同时满足三个条件：燃料（例如：可燃气体）和氧气（空气）以某一个比例同时存在，以及燃源，例如火星或火焰。燃料和氧气的混合比例对于不同的气体混各不相同。
爆炸下限（LEL）是指某种气体在空气中支持燃烧的最小含量。爆炸上限是指某种气体在空气种支持燃烧的最大含量。超过此含量，因其含量过高而不能燃烧。在LEL和UEL之间的范围是该气体的燃烧范围。
表中值在此条件下有效：室温、大气压力，用2英寸管火花点火。多数气体爆炸范围因温度、压力和容器尺寸增加而增大。
所有含量均为体积百分比。
| Gas
|
Gas
|
LEL
|
UEL
|
|
Acetone |
丙酮 |
2.6 |
13.0 |
|
Acetylene |
乙炔 |
2.5 |
100.0 |
|
Acrylonitrile |
丙稀腈 |
3.0 |
– |
|
Allene |
丙二烯 |
1.5 |
11.5 |
|
Ammonia |
氨 |
15.0 |
28.0 |
|
Benzene |
苯 |
1.3 |
7.9 |
|
1,3-Butadiene |
1，3-丁二烯 |
2.0 |
12.0 |
|
Butane |
丁烷 |
1.8 |
8.4 |
|
n-Butanol |
正丁醇 |
1.7 |
12.0 |
|
1-Butene |
1-丁烯 |
1.6 |
10.0 |
|
Cis-2-Butene |
顺-2-丁烯 |
1.7 |
9.7 |
|
Trans-2-Butene |
反-2-丁烯 |
1.7 |
9.7 |
|
Butyl Acetate |
醋酸丁酯 |
1.4 |
8.0 |
|
Carbon Monoxide |
一氧化碳 |
12.5 |
74.0 |
|
Carbonyl Sulfide |
硫化羰 |
12.0 |
29.0 |
|
Chlorotrifluoroethylene |
一氯三氟乙烯 |
8.4 |
38.7 |
|
Cumene |
异丙基苯 |
0.9 |
6.5 |
|
Cyanogen |
氰 |
6.6 |
32.0 |
|
Cyclohexane |
环乙胺 |
1.3 |
7.8 |
|
Cyclopropane |
环丙烷 |
2.4 |
10.4 |
|
Deuterium |
氘 |
4.9 |
75.0 |
|
Diborane |
乙硼烷 |
0.8 |
88.0 |
|
Dichlorosilane |
二氯甲硅烷 |
4.1 |
98.8 |
|
Diethylbenzene |
二乙苯 |
0.8 |
– |
|
1,1-Difluoro-1-Chloroethane |
1,1-二氟氯乙烷< |
9.0 |
14.8 |
|
1,1-Difluoroethane |
1,1-二氟乙烷 |
5.1 |
17.1 |
|
1,1-Difluoroethylene |
1,1-二氟乙烯 |
5.5 |
21.3 |
|
Dimethylamine |
二甲胺 |
2.8 |
14.4 |
|
Dimethyl Ether |
二甲醚 |
3.4 |
27.0 |
|
2,2-Dimethylpropane |
2,2-二甲基丙烷 |
1.4 |
7.5 |
|
Ethane |
乙烷 |
3.0 |
12.4 |
|
Ethanol |
乙醇 |
3.3 |
19.0 |
|
Ethyl Acetate |
乙酸乙酯 |
2.2 |
11.0 |
|
Ethyl Benzene |
乙苯 |
1.0 |
6.7 |
|
Ethyl Chloride |
氯乙烷 |
3.8 |
15.4 |
|
Ethylene |
乙烯 |
2.7 |
36.0 |
|
Ethylene Oxide |
环氧乙烷 |
3.6 |
100.0 |
|
Gasoline |
汽油 |
1.2 |
7.1 |
|
Heptane |
庚烷 |
1.1 |
6.7 |
|
Hexane |
（正）乙烷 |
1.2 |
7.4 |
|
Hydrogen |
氢 |
4.0 |
75.0 |
|
Hydrogen Cyanide |
氰化氢 |
5.6 |
40.0 |
|
Hydrogen Sulfide |
氢化硫 |
4.0 |
44.0 |
|
Isobutane |
异丁烷 |
1.8 |
8.4 |
|
Isobutylene |
异丁烯 |
1.8 |
9.6 |
|
Isopropanol |
异丙醇 |
2.2 |
– |
|
Methane |
甲烷 |
5.0 |
15.0 |
|
Methanol |
甲醇 |
6.7 |
36.0 |
|
Methylacetylene |
丙炔 |
1.7 |
11.7 |
|
Methyl Bromide |
甲基溴、溴化甲烷 |
10.0 |
15.0 |
|
3-Methyl-1-Butene |
3甲醇丁烯< |
1.5 |
9.1 |
|
Methyl Cellosolve |
甲氧基乙醇、乙二醇一甲醚 |
2.5 |
20.0 |
|
Methyl Chloride |
氯甲烷 |
7.0 |
17.4 |
|
Methyl Ethyl Ketone |
丁酮、甲基乙基甲酮 |
1.9 |
10.0 |
|
Methyl Mercaptan |
甲硫醇 |
3.9 |
21.8 |
|
Methyl Vinyl Ether |
甲基乙烯基醚 |
2.6 |
39.0 |
|
Monoethylamine |
一乙胺 |
3.5 |
14.0 |
|
Monomethylamine |
一甲胺 |
4.9 |
20.7 |
|
Nickel Carbonyl |
羰基镍 |
2.0 |
- |
|
Pentane |
戊烷 |
1.4 |
7.8 |
|
Picoline |
甲基吡啶 |
1.4 |
– |
|
Propane |
丙烷 |
2.1 |
9.5 |
|
Propylene |
丙稀 |
2.4 |
11.0 |
|
Propylene Oxide |
环氧丙烷 |
2.8 |
37.0 |
|
Styrene |
苯乙烯 |
1.1 |
– |
|
Tetrafluoroethylene |
四氟乙烯 |
4.0 |
43.0 |
|
Tetrahydrofuran |
四氢呋喃 |
2.0 |
– |
|
Toluene |
甲苯 |
1.2 |
7.1 |
|
Trichloroethylene |
三氯乙烯 |
12.0 |
40.0 |
|
Trimethylamine |
三甲胺 |
2.0 |
12.0 |
|
Turpentine |
松脂(精)、松节油 |
0.7 |
– |
|
Vinyl Acetate |
醋酸乙烯酯 |
2.6 |
– |
|
Vinyl Bromide |
乙烯基溴 |
9.0 |
14.0 |
|
Vinyl Chloride |
乙烯基氯 |
4.0 |
22.0 |
|
Vinyl Fluoride |
氟化乙烯、乙烯基氟 |
2.6 |
21.7 |
|
Xylene |
二甲苯 |
1.1 |
6.6 |
|
|
|
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