1. DANGEROUS GOODS CLASSES

2. Class 1 - Explosives
Information on this graphic changes depending on which, "Division" of explosive is shipped. Explosive Dangerous Goods have compatibility group letters assigned to facilitate segregation during transport. The letters used range from A to S excluding the letters I, M, O, P, Q and R. The actual letter shown would depend on the specific properties of the substance being transported.

3. 1. 1 — Explosives with a mass explosion hazard
1.1 — Explosives with a mass explosion hazard. (nitroglycerin/dynamite)
1.2 — Explosives with a blast/projection hazard.
1.3 — Explosives with a minor blast hazard. (rocket propellant, display fireworks)
1.4 — Explosives with a major fire hazard. (consumer fireworks, ammunition)
1.5 — Blasting agents.
1.6 — Extremely insensitive explosives.

4. Class 2 - Gases
Gases which are compressed, liquefied or dissolved under pressure as detailed below. Some gases have subsidiary risk classes; poisonous or corrosive.
2.1 Flammable Gas: Gases which ignite on contact with an ignition source, such as acetylene and hydrogen.
2.2 Non-Flammable Gases: Gases which are neither flammable nor poisonous. Includes the cryogenic gases/liquids (temperatures of below -100°C) used for cryopreservation and rocket fuels, such as nitrogen and neon.
2.3 Poisonous Gases: Gases liable to cause death or serious injury to human health if inhaled; examples are fluorine, chlorine, and hydrogen cyanide.

5. Class 3 – Flammable liquids
Flammable liquids included in Class 3 are included in one of the following packing groups:
Packing Group I, if they have an initial boiling point of 35°C or less at an absolute pressure of kPa and any flash point, such as diethyl ether or carbon disulfide;
Packing Group II, if they have an initial boiling point greater than 35°C at an absolute pressure of kPa and a flash point less than 23°C, such as gasoline (petrol) and acetone; or
Packing Group III, if the criteria for inclusion in Packing Group I or II are not met, such as kerosene and diesel.

6. Class 4 – Flammable solids
This class is divided into three subs-classes. These are flammable solids (4.1), substances liable to spontaneous combustion ( 4.2) and substances which ,when in contact with water, emit flammable gases. (4.3).

7. Class 5 – Oxidising agents and organic peroxides
Class 5.1 contains oxidising agents which may liberate oxygen and thus contribute to the destructive capability of a fire. This group contains nitrate, permanganates, peroxide etc. Class 5.2 contains the organic peroxides which are likely to be combustible, decompose easily and react readily with other substances. Most are sensitive to impact or friction.

8. Class 6 – Poisonous and infectious substances
Class 6.1 is poisons and class 6.2 is infectious substances. The poisons are sub-divided into classes that are liable to cause death or serious injury if swallowed, inhaled or taken in by skin contact. This class (6.1 a) contains some carcinogens, some cyanides and chloroform. Class 6.1(b) includes substances that are harmful to human health if swallowed or contacted by skin, included in this group are things like hexachlorophene.

9. Class 7 – Radioactive substances
These materials spontaneously emit radiation and are sub-divided into four sub-classes according to the type and amount of radiation emitted. These substances should not be present in normal laboratories.

10. Class 8 – Corrosive substances
This class contains the chemicals which can seriously damage living tissue: included in this class are acids and alkalis.

11. Class 9 – Miscellaneous dangerous goods
These are substances that present a danger but are not covered by the other dangerous goods classes. An example is dry ice.