Four-digit numbers used to identify dangerous goods and hazardous substances in international transport are called what?

Four-digit numbers used to identify dangerous goods and hazardous substances in international transport are called what?

• A. UN IDs
• B. UN numbers
• C. CAS numbers
• D. ISINs

Answer: (C)

The four-digit codes used to identify dangerous goods in international transport are UN numbers. These are assigned by the United Nations to categorize and identify hazardous substances, and they are used across all modes of transport to inform packaging, labeling, handling, and emergency response. For example, different fuels and hazardous materials each have their own UN number, which quickly conveys the nature of the hazard on shipping papers and placards. CAS numbers identify chemical substances in literature and databases, not transport classifications, and they are not restricted to four digits. ISINs identify financial instruments, not chemicals or dangerous goods. So the four-digit identifiers for dangerous goods in international transport are UN numbers.

The four-digit codes used to identify dangerous goods in international transport are UN numbers. These are assigned by the United Nations to categorize and identify hazardous substances, and they are used across all modes of transport to inform packaging, labeling, handling, and emergency response. For example, different fuels and hazardous materials each have their own UN number, which quickly conveys the nature of the hazard on shipping papers and placards.

CAS numbers identify chemical substances in literature and databases, not transport classifications, and they are not restricted to four digits. ISINs identify financial instruments, not chemicals or dangerous goods. So the four-digit identifiers for dangerous goods in international transport are UN numbers.