Which hazard descriptor would apply to a material that emits radiation as part of its hazardous properties?

Which hazard descriptor would apply to a material that emits radiation as part of its hazardous properties?

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

Answer: (B)

Radiation emission defines the hazard of a radioactive substance. When a material emits ionising radiation as part of its hazardous properties, the descriptor used is “radioactive substance,” signaling that the primary risk comes from radiation exposure rather than flammability or physical violence like an explosion. This distinction matters because handling radioactive materials requires shielding, monitoring, and distance to limit exposure, which are not the main precautions for the other hazards listed. The other descriptors describe different risks: spontaneously combustible refers to materials that ignite on contact with air, non-flammable compressed gas denotes gases that do not burn, and explosive indicates rapid energy release but not radiation.

Radiation emission defines the hazard of a radioactive substance. When a material emits ionising radiation as part of its hazardous properties, the descriptor used is “radioactive substance,” signaling that the primary risk comes from radiation exposure rather than flammability or physical violence like an explosion. This distinction matters because handling radioactive materials requires shielding, monitoring, and distance to limit exposure, which are not the main precautions for the other hazards listed.

The other descriptors describe different risks: spontaneously combustible refers to materials that ignite on contact with air, non-flammable compressed gas denotes gases that do not burn, and explosive indicates rapid energy release but not radiation.