UN1954 COMPRESSED GAS, FLAMMABLE N.O.S. (METHANE, HYDROGEN) 2.1 18.63% NITROGEN, 0.70% OXYGEN OR ARGON, 18.98% HYDROGEN, 0.07% CARBON MONOXIDE, 0.93% CARBON DIOXIDE, 2.96% ETHANE, 1.20% ETHYLENE, 2.70% PROPANE, 2.88% PROPYLENE, 1.10% ISOBUTANE, 0.66% NORMAL BUTANE, 0.88% TRANS-2-BUTENE, 0.27% ISOBUTENE, 0.55% ACETYLENE, 0.55% 1,3 BUTADIENE, 0.55% N-PENTANE, 0.875% CIS-2-BUTENE, METHANE BALANCE PRIMARY, SIZE 350