Which hazard class designation is used for non-flammable gases?

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Multiple Choice

Which hazard class designation is used for non-flammable gases?

Gases are grouped under Class 2, with subdivisions that distinguish flammability and toxicity. Non-flammable gases fall into the subdivision for non-flammable, non-toxic gases, meaning they do not ignite under normal conditions and aren’t toxic at typical exposure levels. That’s why this option is the best match: it identifies the category for gases that do not burn, like nitrogen or helium (often encountered as inert or carrier gases). The other options describe other material types—flammable gases that can ignite, or flammable liquids from Class 3—which do not apply to non-flammable gases.

Gases are grouped under Class 2, with subdivisions that distinguish flammability and toxicity. Non-flammable gases fall into the subdivision for non-flammable, non-toxic gases, meaning they do not ignite under normal conditions and aren’t toxic at typical exposure levels. That’s why this option is the best match: it identifies the category for gases that do not burn, like nitrogen or helium (often encountered as inert or carrier gases). The other options describe other material types—flammable gases that can ignite, or flammable liquids from Class 3—which do not apply to non-flammable gases.

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