From Confusion to Clarity: Mastering Proper Shipping Name in Logistics

The Proper Shipping Name (PSN) is the official, regulatory name used to identify hazardous materials on shipping papers, labels, and placards. It ensures consistent identification for safety, emergency response, and legal compliance across transport modes.

What is the Proper Shipping Name?

The Proper Shipping Name (PSN) is the exact, standardized name that regulations require when describing a hazardous material in transport documentation, markings, and labels. It is a legal identifier used by regulators, carriers, emergency responders, and shippers to ensure that the material is correctly classified and handled. PSNs are published in transport regulations such as the U.S. DOT 49 CFR, the IATA Dangerous Goods Regulations, and the IMDG Code.

Why it matters (in plain terms)

Using the correct PSN prevents confusion at every step of the supply chain. Emergency responders rely on the PSN and UN number to choose the right firefighting or spill-control methods. Carriers and terminal operators use it to determine stowage, segregation, and handling. Regulators use it to check compliance and assess penalties. For a shipper, the right PSN reduces delays, fines, and safety incidents.

How to identify the correct PSN — step-by-step for beginners

• Start with the product documentation: review the Safety Data Sheet (SDS/MSDS). The SDS contains composition and hazard class information needed for classification.
• Determine the material's hazard class and, if applicable, subsidiary hazards. Classification rules vary by regulation, but the SDS usually gives you the starting point.
• Search the applicable regulations (49 CFR, IATA, IMDG, ADR) for the matching entry. Many regulatory tables list PSNs alongside UN numbers, hazard class, and packing group.
• If the exact formulation is not listed, you may find a generic entry ending with "n.o.s." (not otherwise specified). Use this only when the substance meets the criteria for a generic entry, and include technical names in parentheses as required (for example, "Flammable liquid, n.o.s. (contains acetone and ethanol)").
• Confirm UN number, packing group, quantity limits, and any special provisions or exceptions. Some materials are regulated differently by mode of transport (air vs. sea vs. road).
• Document and apply the PSN exactly as written in the regulation. Small wording differences can change compliance requirements or make a shipment noncompliant.

Key elements that typically accompany a PSN

When using a PSN on shipping papers and labels, you usually include:

• UN/ID number (e.g., UN 1090)
• Proper Shipping Name (exact wording from the regulation)
• Hazard class/division (e.g., 3 for flammable liquids)
• Packing group (if applicable, e.g., PG II)
• Subsidiary risks, flashpoint, or other special information as required

Common examples

• Acetone — Regulation: 49 CFR/IMDG/IATA; Typical entry: UN 1090, Acetone, 3, PG II. A PSN is the word "Acetone" as shown in the regulations, not a trade name like "Nail Polish Remover".
• Gasoline — UN 1203, Gasoline. Ensure the exact regulatory name is used rather than local synonyms.
• Flammable liquid, n.o.s. — Used when a specific formulation doesn't have its own entry. You must list the technical names in parentheses (for example, "Flammable liquid, n.o.s. (contains methyl ethyl ketone)").

Best practices

• Always use the SDS as the starting point. If the SDS is unclear, contact the manufacturer for clarification.
• Use the exact wording from the applicable transport regulation. Don’t substitute a colloquial or trade name.
• Keep up-to-date with regulation changes. Names, UN numbers, or special provisions can change with new editions.
• Train personnel who prepare shipping papers and labels. Errors are commonly made by staff unfamiliar with regulatory language.
• Use software or reference guides that cross-reference SDS data with regulatory PSN entries to reduce manual errors.
• Document any decisions about using a generic "n.o.s." entry and the reason the substance qualifies for it.

Common mistakes to avoid

• Using trade or brand names instead of the PSN (e.g., writing "SuperClean" rather than the required regulatory name).
• Omitting or misplacing the UN number, hazard class, or packing group.
• Assuming PSNs are interchangeable between modes of transport — wording and allowed exceptions can differ between air, sea, and road rules.
• Using outdated or deprecated entries (for example, relying on ORM-D designations that have been phased out for air transport).
• Failing to list required technical names when using "n.o.s." entries or not including subsidiary hazards.

Practical scenario — a quick example

Imagine you ship a container of nail polish remover. The SDS shows the main component is acetone (a Class 3 flammable liquid). The correct PSN in the regulations is "Acetone." Your shipping papers should read something like: "UN 1090, Acetone, 3, PG II" (followed by quantity and any additional regulatory info). Writing "Nail Polish Remover" instead could lead to refusal by the carrier or enforcement action.

When to seek expert help

If a product has multiple hazardous components, unusual formulations, or you’re unsure whether it fits a specific entry, consult a hazardous materials specialist or certified dangerous goods consultant. Errors can cause legal penalties and expose personnel to risks.

Final tips for beginners



Keep an up-to-date library of SDS documents, rely on authoritative regulatory tables for PSNs, and build simple checklists for shipping paperwork that confirm PSN, UN number, hazard class, packing group, and emergency response information are all present. Small attention to detail up front prevents bigger problems downstream.