What Is a Non-Flammable Gas Label?

Non-Flammable Gas Label A dangerous-goods hazard label used to communicate the transport hazard classification represented by 'Non-Flammable Gas Label'.

The Non-Flammable Gas Label identifies shipments whose primary transport hazard is that they contain gases which are neither flammable nor toxic (commonly assigned to Class 2.2 in most transport regulations). The label is part of a standardized system of markings, placards and documentation that tells carriers, emergency responders, and handlers what risks the packaged material presents during storage and movement.

Why The Label Matters

Labels reduce ambiguity during handling and emergency response. A correctly applied non-flammable gas label signals the absence of fire or acute toxicity hazards, while still flagging other risks: pressurization, asphyxiation in confined spaces, or reactivity under certain conditions. For warehouses, carriers and shippers, proper labeling lowers liability, prevents misrouting, and supports compliance with federal and international requirements.

What The Label Typically Looks Like

Visual standards vary by mode and regulatory framework, but common elements include a symbol representing a gas cylinder, a plain background color or panel, and the class/division number. For example, many regulatory charts and international guidance assign a gas cylinder pictogram and the numeric class ("2") to gas labels; Class 2.2 is commonly described as “non-flammable, non-toxic gas.” Labels must be durable, legible, and affixed where visible on the package.

When To Use It

Use the label when a shipped package contains gas that meets the criteria for non-flammable, non-toxic gases under the applicable regulations (e.g., 49 CFR in the U.S., ADR for road in Europe, ICAO/IATA for air). Criteria typically include physical properties such as flammability limits, vapor pressure, and toxicity thresholds defined by regulators. If the gas is liquefied, refrigerated, or pressurized, and it is not categorized as flammable (Class 2.1) or toxic (Class 2.3), apply the non-flammable gas label.

How It Varies By Mode And Regulation

• U.S. Road/Rail (49 CFR): Labels and placarding specifications are listed in Part 172; the non-flammable gas class and proper shipping names come from the Hazardous Materials Table.
• Air (ICAO/IATA): Air rules are stricter about packaging and labeling for gases; some non-flammable gases may still be limited or forbidden on passenger aircraft.
• International (UN/ADR): The UN Model Regulations provide harmonized guidance that many countries adopt; labeling elements align but details (size, color, language) can differ.

Who Is Responsible For The Label

Responsibility usually falls on the shipper/offeror to classify the material correctly and affix required labels. Carriers and freight forwarders verify label presence and may reject improperly marked shipments. Facilities that consolidate or repackage shipments must also ensure labels remain accurate after packing operations.

Practical Example

A manufacturer ships argon cylinders to a metal-fabrication customer. Argon is an inert, non-flammable gas and meets non-flammable gas criteria. The shipper lists the proper shipping name and UN number on the shipping paper, affixes the non-flammable gas label and ensures cylinder valves are protected. The truck driver sees the label at pickup and places the cylinders where they won't be exposed to heat or confined in a poorly ventilated compartment.

Tips For Compliance

• Classify First: Use manufacturer safety data sheets and regulatory criteria to confirm the gas falls into the non-flammable, non-toxic class before labeling.
• Check Mode Rules: Confirm air transport restrictions; what’s allowed by road may be limited by air carriers or ICAO.
• Durable Labels: Use weather- and solvent-resistant labels sized per the applicable regulation so they remain legible throughout transit.
• Document Match: Ensure the label matches the shipping description, UN number and emergency contact information on the shipping papers.

In short, the Non-Flammable Gas Label communicates that a package contains gases that are not flammable or acutely toxic but still pose transport risks (pressure, asphyxiation). Correct classification, consistent labeling and adherence to modal rules keep shipments lawful and safer to handle.