For self-reactive substances in Division 4.1 and Organic Peroxides in Division 5.2, which label must be placed on the same face as the hazard label and in close proximity to it?

• A. Cryogenic Liquids
• B. Keep Away From Heat
• C. Package Orientation
• D. Radioactive Material, Excepted Package

Answer: (B)

Self-reactive substances (Division 4.1) and organic peroxides (Division 5.2) can undergo dangerous decomposition or initiation if heated. Because heat is the key trigger for these materials, a warning label that says “Keep Away From Heat” is essential to convey the exact handling risk. Placing this secondary warning on the same face as the primary hazard label and in close proximity ensures the warning is immediately visible alongside the hazard information, so anyone handling, loading, or storing the package will see both hazards together and take precautions to avoid heat sources, ignition, or elevated temperatures. The other options don’t address this specific risk: Cryogenic Liquids relate to extreme cold hazards; Package Orientation is about how the package should be positioned; Radioactive Material, Excepted Package pertains to radioactive materials, not to heat-induced decomposition behavior.