UN1954 COMPRESSED GAS,FLAMMABLE, N.O.S. (HYDROGEN, METHANE) 2.1 3% HYDROGEN SULFIDE, 2% CARBON MONOXIDE, 1% ACETYLENE, 1% PROPADIENE, 1% ARGON, 3% 1,3 BUTADIENE, 4% N-BUTANE, 2% 1-BUTENE, 4% CARBON DIOXIDE, 2% CIS-2-BUTENE, 0.30% CYCLOPROPANE, 5% ETHANE, 4% ETHYLENE, 0.25% N-HEXANE, 5% ISOBUTANE, 1% ISOBUTYLENE, 1% ISOPENTANE, 0.50% 3-METHYL-1-BUTENE, 10% METHANE, 6% NITROGEN, 1% N-PENTANE, 6% PROPANE, 4% PROPYLENE, 3% TRANS-2-BUTENE, HYDROGEN BALANCE CERTIFIED, SIZE LP5AL