Which statement about UN/NA numbers is true?

Which statement about UN/NA numbers is true?

• A. They are four-digit identifiers used for universal recognition of HazMat.
• B. They are numbers that indicate the lot number.
• C. They indicate the shipping date.
• D. They identify the packaging type.

Answer: (A)

These numbers are four-digit identifiers assigned to specific hazardous materials so anyone handling or responding to a spill can instantly recognize the substance, regardless of language or country. This universal labeling helps ensure consistent safety procedures, packaging, and emergency response. UN numbers cover international shipments, while NA numbers serve the same identifying purpose for shipments within North America. They appear on labels, placards, and shipping papers to guide proper handling. They are not batch or lot numbers, not indicators of shipping date, and not reflections of packing type.

These numbers are four-digit identifiers assigned to specific hazardous materials so anyone handling or responding to a spill can instantly recognize the substance, regardless of language or country. This universal labeling helps ensure consistent safety procedures, packaging, and emergency response. UN numbers cover international shipments, while NA numbers serve the same identifying purpose for shipments within North America. They appear on labels, placards, and shipping papers to guide proper handling. They are not batch or lot numbers, not indicators of shipping date, and not reflections of packing type.