UN1954 COMPRESSED GAS, FLAMMABLE N.O.S. (METHANE, ETHANE) 2.1 0.03% N-HEXANE, 0.1% ISO-PENTANE, 0.1% N-PENTANE, 0.1% NEO-PENTANE, 0.3% ISO-BUTANE, 0.3% N-BUTANE, 1% CARBON DIOXIDE, 1% PROPANE, 2.5% NITROGEN, 5% ETHANE, 89.57% METHANE PRIMARY, SIZE LP5 CUSTOMER OWNED CYLINDER