LEL of Combustible Gases

Acetone	2.5% by volume
Acetylene	2.5% by volume
Benzene	1.2% by volume
Butane	1.9% by volume
Butyl Alcohol (Butanol)	1.4% by volum
Diethyl Ether	1.9% by volume
Ethane	3.0% by volume
Ethyl Alcohol (Ethanol)	3.3% by volume
Ethylene	2.7% by volume
Ethylene Oxide	2.7% by volume
Hexane	1.1% by volume
Hydrogen	4.0% by volume
Isopropyl Alcohol (Isopropanol)	2.0% by volume
Methane	5.0% by volume
Methyl Alcohol (Methanol)	6.0% by volume
Methyl Ethyl Ketone	1.4% by volume
n-Pentane	1.4% by volume
Propane	2.1% by volume
Propylene	2.0% by volume
Styrene	0.9% by volume
Toluene	1.1% by volume
Xylene	1.1% by volume

% Lower Explosive Limit (% LEL) =

(% Concentration of Gas by Volume) x (100)
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Lower Explosive Limit % by Volume

25% LEL Pentane =

(.35% Volume) x (100)
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1.4% by Volume = (100% LEL)

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