C12400000 Compressed gases, flammable, toxic, n.o.s. Inhalation Hazard Zone A [UN1953] [Poison gas, Flammable gas] Compressed gases, flammable, toxic, n.o.s. Inhalation Hazard Zone B [UN1953] [Poison gas, Flammable gas] Compressed gases, flammable, toxic, n.o.s. Inhalation Hazard Zone C [UN1953] [Poison gas, Flammable gas] Compressed gases, flammable, toxic, n.o.s. Inhalation Hazard Zone D [UN1953] [Poison gas, Flammable gas] UN1953