The UN Number is four digits and identifies the material. Which statement best describes this?

The UN Number is four digits and identifies the material. Which statement best describes this?

• A. It identifies the material
• B. It identifies the hazard class
• C. It identifies the packing group
• D. It identifies the shipping route

Answer: (A)

The UN number is used to identify the material. Four-digit UN numbers are assigned to specific hazardous substances or articles and point to a particular material in transport regulations, so wherever the UN number appears (shipping papers, labels, placards), everyone knows exactly what chemical or item is involved. This precise identification supports correct handling, compatibility with packaging rules, and appropriate emergency response. The hazard class is a separate attribute that describes the type of danger, the packing group indicates how packaging should be rated, and the shipping route is determined by logistics—not by the UN number itself.

The UN number is used to identify the material. Four-digit UN numbers are assigned to specific hazardous substances or articles and point to a particular material in transport regulations, so wherever the UN number appears (shipping papers, labels, placards), everyone knows exactly what chemical or item is involved. This precise identification supports correct handling, compatibility with packaging rules, and appropriate emergency response. The hazard class is a separate attribute that describes the type of danger, the packing group indicates how packaging should be rated, and the shipping route is determined by logistics—not by the UN number itself.