Which hazard descriptor describes a gas that is stored under pressure and is not flammable?

Which hazard descriptor describes a gas that is stored under pressure and is not flammable?

• A. Non-flammable compressed gas
• B. Radioactive substance
• C. Spontaneously Combustible
• D. Explosive

Answer: (A)

Gas hazard labels mix two ideas: whether the gas is flammable and whether it’s stored under pressure. For a gas that is stored under pressure and is not flammable, the correct descriptor is non-flammable compressed gas. This signals that the main concern is the high-pressure container rather than a fire risk, so handling focuses on avoiding puncture, ensuring venting safety, and protecting from rapid gas release. The other descriptors point to different hazards: radioactive substance means radioactivity, spontaneously combustible means it can ignite on its own in air, and explosive means it may detonate. None of those apply to a non-flammable gas kept under pressure.

Gas hazard labels mix two ideas: whether the gas is flammable and whether it’s stored under pressure. For a gas that is stored under pressure and is not flammable, the correct descriptor is non-flammable compressed gas. This signals that the main concern is the high-pressure container rather than a fire risk, so handling focuses on avoiding puncture, ensuring venting safety, and protecting from rapid gas release. The other descriptors point to different hazards: radioactive substance means radioactivity, spontaneously combustible means it can ignite on its own in air, and explosive means it may detonate. None of those apply to a non-flammable gas kept under pressure.