UN3161 LIQUEFIED GAS, FLAMMABLE N.O.S. (N-BUTANE, ISOBUTANE) 2.1 2% PROPANE, 30% ISOBUTANE, 0.3% N-PENTANE, 0.3% ISOPENTANE, 0.1% N-HEXANE, 5 PPM HYDROGEN SULFIDE, 5 PPM CARBONYL SUFLIDE, 5 PPM METHYL MERCAPTAN, N-BUTANE BALANCE PRIMARY STANDARD, SIZE 150AL W/DIPTUBE LIQUID PHASE CUSTOMER OWNED CYLINDER