In what reference materials can you find the 4 digit UN/DOT number assigned, given the product name?

• A. Shipping papers
• B. Emergency Response Guidebook (ERG)
• C. MSDS Sheets
• D. Manufacturer's label

Answer: (B)

UN numbers are the four-digit codes that identify hazardous materials and are used for quick reference during handling and emergencies. When you know a product by name and need its UN/DOT number, the Emergency Response Guidebook is the most useful source because it is designed to be looked up by the product’s name and then immediately provides the corresponding UN number along with initial action guidance. This direct lookup by product name to UN number is what responders rely on in the field to quickly identify hazards and begin proper response steps. While shipping papers, MSDS/SDS, and manufacturer labels can contain the UN number as well, the ERG is specifically structured to allow locating the UN number from the product name itself, which is why it’s the best fit here.