UN1954 COMPRESSED GAS,FLAMMABLE, N.O.S. (METHANE, ETHANE) 2.1 0.1000% HEPTANE, 0.1000% HEXANE, 0.1440% N-PENTANE, 0.1730% ISOPENTANE, 0.3030% NITROGEN, 0.3670% CARBON DIOXIDE, 0.4010% ISOBUTANE, 0.6740% N-BUTANE, 2.479% PROPANE, 4.587% ETHANE,' 250 PPM METHANOL,METHANE BALANCE CERTIFIED, SIZE 150AL