Dangerous Goods Classes and Marks
Explore classes, divisions and distinctions between reference figures.
Use this guide to recognise headings and reference marks. It does not determine your product’s class, UN number, required label or transport acceptance. Review the current safety data sheet with a qualified specialist.
The figures are unchanged educational examples from the Canadian TDG regulatory appendix. Labels, placards and other marks differ; these are neither an official edition nor print-ready label templates. Confirm shipment marks against transport mode and national requirements.
Find a class or division
Mass explosion hazard
An explosion-hazard heading that can affect most of a load together.
Stars in the shared source figure are division/compatibility placeholders and are not filled here.
Projection hazard
Distinguished by projection hazard without a mass-explosion hazard.
Stars in the shared source figure are division/compatibility placeholders and are not filled here.
Fire-related explosive hazard
A heading combining fire with limited blast or projection effects.
Stars in the shared source figure are division/compatibility placeholders and are not filled here.
Limited explosion hazard
Effects are largely limited to the package area; this does not mean harmless.
Very insensitive explosive substances
Substances with a mass-explosion hazard despite low sensitivity.
Extremely insensitive explosive articles
Extremely insensitive articles without a mass-explosion hazard.
Flammable gases
A division heading identifying flammable-gas hazards.
Non-flammable, non-toxic gases
Distinguished by these two properties; other hazards may remain.
Toxic gases
A transport-hazard heading relating to toxic effects of gases.
Flammable liquids
A transport-hazard heading relating to liquid flammability.
Flammable solids and related reactive substances
Includes flammable solids and certain reactive substances regulated under this heading.
Substances liable to spontaneous combustion
A heading relating to self-heating or spontaneous combustion.
Substances emitting flammable gas in contact with water
A hazard heading relating to flammable-gas formation on contact with water.
Oxidising substances
A heading relating to effects that can initiate or intensify combustion of other materials.
Organic peroxides
An organic-peroxide heading relating to thermal instability and decomposition hazards.
Toxic substances
Substances that can cause toxic effects through inhalation, swallowing or skin contact.
Infectious substances
A heading relating to agents that can cause disease in humans or animals.
The source package label includes Canadian language and phone text, so it is not displayed as a universal example. A label, placard and Category B mark are different.
Radioactive material
A transport-hazard heading relating to radioactivity; label categories are separate.
Corrosive substances
A heading relating to corrosive effects on tissue or certain metals.
Miscellaneous dangerous substances and articles
A shared heading for transport hazards regulated outside the preceding classes.
No heading matches. Search does not classify a product.
Class 9, model 9A and the battery mark
9A is a label model, not a new class or division. The class number at the bottom is 9. The red-hatched rectangular battery mark is a separate mark. Confirm battery type and the applicable transport rules separately.
Class 7 label categories
I-White, II-Yellow and III-Yellow are label categories, not divisions 7.1, 7.2 or 7.3. Contents, activity and transport-index fields are not filled automatically; the fissile label carries separate additional information.
Distinguish other marks from labels
The Category B mark and marine-pollutant mark are separate headings. The tree/fish mark alone is not a Class 9 label. These examples do not select the required mark.
Check date: General information. Confirm product, route and handling conditions with the Gulf Sea team.
Return to sea, road and air sourcesDiscuss special cargo conditions with the team