When should you never mark a package with a PSN or a UN/NA Identification Number?

When should you never mark a package with a PSN or a UN/NA Identification Number?

• A. If It Does Not Contain the Identified Hazardous Material.
• B. Always for HazMat shipments.
• C. If the shipment is international.
• D. If the package is non-bulk.

Answer: (A)

The key idea is hazard communication: PSN and UN/NA identification numbers are used to convey specific information about a hazardous material, but only if the package actually contains that material. If the box doesn’t hold the identified hazardous material, applying those markings would be misleading and could lead to improper handling, regulatory issues, or confusion for anyone who might transport or respond to the shipment. So you never mark with a PSN or UN # unless the contents are a listed hazmat. If the material is hazardous, labeling is appropriate; if it isn’t, you leave those hazmat identifiers off.

The key idea is hazard communication: PSN and UN/NA identification numbers are used to convey specific information about a hazardous material, but only if the package actually contains that material. If the box doesn’t hold the identified hazardous material, applying those markings would be misleading and could lead to improper handling, regulatory issues, or confusion for anyone who might transport or respond to the shipment. So you never mark with a PSN or UN # unless the contents are a listed hazmat. If the material is hazardous, labeling is appropriate; if it isn’t, you leave those hazmat identifiers off.