There a 3 Flammable Gases labels: Flammable Gas, Non-Flammable Gas and Toxic Gas
Gases in Class 2 are divided into three divisions, each with its own unique hazard class label.
Hazard Class 2 Flammable Gas
Red Label
Flammable gases in Division 2.1, such as hydrogen, acetylene,
and propane, require a red label with a flame icon on the top
and the number 2 at the bottom.
Hazard Class 2 Non-Flammable Gas Green Label
Non-flammable gases in Division 2.2, such as nitrogen,
refrigerants, and other inert gases, require a green label with
a cylinder icon on the top and the number 2 at the bottom.
Hazard Class 2 Toxic Gas White Label
Toxic gases in Division 2.3, such as chlorine, require a white
label with a "skull and crossbones" icon on top and the number 2
on the bottom. In the US, these materials are called Inhalation
Hazards and the label is slightly modified to contain a black
background behind the "skull and crossbones." This modified
label is required for toxic gases transported into or within the
United States.
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