Substances and articles that have a mass explosion hazard.

Substances and articles that have a projection hazard, but not a mass explosion hazard.

Substances and articles that are a fire hazard, or a minor projection hazard (or both), but not a mass explosion hazard.

Substances and articles which present no significant hazard. This divisions comprises substances and articles which present only a small hazard in the event of ignition or initation during.

Very insensitive substances that have a mass explosion hazard transport.

Extremely insensitive articles which do not have a mass explosion hazard.

Flammable gases. "Flammable" has the same meaning as "Inflammable".

Non-flammable, no toxic gases i.e. asphyxiating. "Toxic" has the same meaning as poisonous

Toxic gases

Flammable liquids have a flashpoint of below 61C. This means that at temperatures below 61C the liquid will give off vapour that is ignited by a spark, flame or heat.

Readily combustible solids, and solids that may ignite through friction, and self-reactive substances.

Substances liable to spontaneously combust on contact with air.

Substances which, when in contact with water, emit flammable gases, solids or liquids.

Oxidising substances intensify the risk and intensity of fires by evolving large quantities of oxygen. Can become readily combustible when mixed with organic material.

Organic peroxides are heat sensitive and liable to exothermic decomposition, which may lead to explosion. May require temperature-controlled transport.

Toxic substances are liable to cause death or serious injury to humans by swallowing, inhaling or by skin contact with toxic vapour, dust, granules or liquid. "Toxic" has the same meaning as "Poisonous".

Infectious substances are bacteria, viruses, parasites or fungi and can in cargo such as medical samples.

Radioactive materials are those that emit radiation above certain natural limits.

Transport packaging is designed to shield cargo handlers from harmful radiation, regardless of the level of radiation present inside the package.

Details of the radioactive materials and radiation levels are indicated on the cargo labels/placards

Corrosive materials and their vapours destroy living tissue on contact and will seriously damage metals and textiles. Dangerous gases may be evolved during reaction with metals.
May react violently with water.

Miscellaneous substances and articles present a danger during transport that is not represented by other classes.