UN1075 PETROLEUM GASES,LIQUEFIED 2.1 0.1% METHANE, 0.2% ETHANE, 0.3% ETHYLENE, 5% PROPANE, 10% PROPYLENE, 20% ISOBUTANE, 0.5% TRANS-2-BUTENE, 0.4% 1-BUTENE, 0.3% ISOBUTYLENE, 0.2% CIS-2-BUTENE, 0.1% NEOPENTANE, 0.5% ISOPENTANE, 0.4% N-PENTANE, 0.8% 1,3-BUTADIENE, 0.7% 3-METHYL-1-BUTENE, 0.6% TRANS-2-PENTENE, 0.5% 2-METHYL-2-BUTENE, 0.4% 1-PENTENE, 0.3% 2-METHYL-1-BUTENE, 0.2% CIS-2-PENTENE, 0.2% N-HEXANE, 58.3% N-BUTANE CERTIFIED, 1000CC PISTON CYL LIQUID PHASE CUSTOMER OWNED CYLINDER