What is the role of the PSN on shipping documents?

• A. PSN is the official name used on shipping documents and labels.
• B. PSN is the chemical formula.
• C. PSN is the manufacturer's stock code.
• D. PSN is used only for customs.

Answer: (A)

PSN stands for Proper Shipping Name. This is the official name used on shipping documents and on labels to clearly identify the substance or article being shipped. The PSN is selected from the UN Dangerous Goods List and aligns with the item’s UN number and hazard class, so everyone along the transport chain—shippers, carriers, and authorities—knows exactly what is being transported. It must be unambiguous and suitable for transport, and it guides the required packaging, labeling, and documentation. It isn’t a chemical formula, nor a manufacturer’s stock code, and it isn’t only for customs—it's the standard identifier used throughout the entire shipping process.