Proper Shipping Name Explained: A Must-Know for Every Shipper

A Proper Shipping Name (PSN) is the official, standardized name used in transport regulations to identify dangerous or regulated goods on shipping papers, labels, and placards for safe handling and emergency response.

What it is

The Proper Shipping Name (PSN) is the exact, regulator-approved name assigned to a material for transport. Regulatory agencies and international rules—such as the U.S. Department of Transportation (49 CFR), the International Maritime Dangerous Goods (IMDG) Code, and the IATA Dangerous Goods Regulations—require the use of the PSN on shipping documents, package labels, and transport markings. Using the PSN ensures everyone in the supply chain and emergency responders can identify hazards correctly.

Why it matters

Using the correct PSN is essential for safety, regulatory compliance, and claims prevention. The proper name tells carriers, handlers, and first responders what hazards are present and what controls (packaging, labeling, segregation) are required. Incorrect or ambiguous naming can delay shipments, result in fines, or cause unsafe handling and emergency responses.

Core components of a hazardous materials shipping declaration

• Proper Shipping Name: The exact regulatory name used for the substance or article.
• UN/ID Number: The four-digit number (e.g., UN1090) that uniquely identifies many dangerous goods.
• Hazard Class or Division: The primary class (e.g., Class 3 — flammable liquids) and any subsidiary hazards.
• Packing Group: When applicable, indicates the degree of danger (I = high, II = medium, III = low).
• Quantity and Packaging Type: Net quantity per package and the type of packaging used.

How a Proper Shipping Name is chosen

The PSN is determined by comparing the physical and chemical properties of the commodity with entries in relevant regulatory lists and applying assignment rules. Typical steps include

1. Review the Safety Data Sheet (SDS) and manufacturer’s technical information.
2. Identify the primary hazard class and any constituent hazards.
3. Search the applicable regulatory list (for example, the 49 CFR Hazardous Materials Table in the U.S., the IATA DGR, or the IMDG Code) for a matching entry.
4. If no exact match is found, consider whether a generic entry such as "... n.o.s." (not otherwise specified) applies; include technical names in parentheses as required.
5. Confirm UN number, packing group, and any special provisions or modal variations for aviation, maritime, road, or rail transport.

Common examples (illustrative)

• Acetone — listed by its PSN and associated with UN1090 and Class 3 (flammable liquid).
• Flammable liquid, n.o.s. — used when the material’s exact regulated name isn’t listed; the technical name(s) of the hazardous constituent(s) must often be included in parentheses.
• Lithium ion batteries — many variations and special provisions exist; the PSN and documentation depend on battery state, capacity, and whether shipped with or contained in equipment.

Modal differences and cross-references

Different transport modes may have unique rules or additional requirements. The PSN itself is usually consistent across modes, but modal regulations can add special provisions, packing instructions, or limitations (for example, stricter rules for air transport). Always cross-check the applicable regulation for the chosen mode and route.

Best practices for shippers (beginner-friendly)

• Use the manufacturer’s Safety Data Sheet (SDS) as a starting point, but verify the PSN against official regulatory lists before shipping.
• Never use brand, trade, or marketing names on transport documents instead of the PSN.
• Include the UN/ID number, hazard class, packing group, net quantity, and emergency contact on shipping papers and labels.
• Keep regulations up to date: rules change regularly. Subscribe to regulation updates or use current edition manuals (IATA, IMDG, 49 CFR).
• Train staff responsible for classification and documentation. Mistakes are common without formal training.
• Use conservative classification when uncertain and consult a qualified dangerous goods specialist for ambiguous cases.

Common mistakes to avoid

• Using trade names (e.g., brands) instead of the PSN — trade names are not acceptable for transport documentation.
• Assuming a material’s PSN based on similar products — small formulation changes can change classification.
• Omitting required technical names when using "n.o.s." entries.
• Failing to check modal-specific requirements (airfreight often has the strictest rules).
• Misstating or leaving out the UN number or packing group — these are integral to correct classification.
• Not updating the PSN after product reformulation or when receiving new SDS information.

How to confirm when in doubt

If classification isn’t clear from the SDS and regulatory tables, consult a qualified dangerous goods consultant, the manufacturer, or the appropriate regulatory body. Many countries and carriers also offer guidance resources, and commercial software or online lookup tools can help but should be verified against primary regulations.

Practical checklist before shipping

• Have the SDS and product technical data on hand.
• Locate the exact PSN in the applicable regulation.
• Verify UN number, hazard class, and packing group.
• Confirm packaging, marking, and labeling meet the packing instruction.
• Complete shipping papers with PSN, UN number, class, PG, quantity, and emergency contact.
• Ensure staff and carriers are informed of any handling or segregation requirements.

Final note

The Proper Shipping Name is a small phrase with big responsibilities. For new shippers, taking the time to verify the PSN and supporting details will reduce delays, improve safety, and keep you compliant. When in doubt, ask a trained dangerous goods professional — the cost of a quick check is far less than the cost of a misdeclaration.