UN1956 COMPRESSED GAS, N.O.S. (CARBON DIOXIDE, METHANE) 2.2 0.2% METHANE, 0.05% ETHANE, 0.05% PROPANE, 0.02% N-BUTANE, 0.02% ISOBUTANE, 0.02% N-PENTANE, 0.02% ISOPENTANE, 0.02% N-HEXANE, 600 PPM HYDROGEN SULFIDE, CARBON DIOXIDE BALANCE PRIMARY, SIZE 150AL CUSTOMER OWNED CYLINDER