DANGEROUS GOODS CLASSIFICATION HK CATEGORY & IMDG.

DG CATEGORIES LIST
Listed on 12-Nov-2007
Signs

Class

HK CAT

Descriptions

Examples
Class 1
1
1
Explosive substances or articles used to produce explosions
Explosives, munitions, fireworks and flares.
Class 2
2.1
2

Flammable gas

Gases that can ignite in air on contact with a source of ignition.
such as Butane, propane, lighter fuels or refills.
Class 2
2.2
2

Non-flammable, non-toxic gas

Gases that are non-flammable, but may cause suffocation.
such as Aqualung cylinders, aerosols.
2.3
2

Toxic gas

Gases likely to cause death or serious injury if inhaled.
Class 2
3
5

Flammable liquids

Liquids, the vapors of which can ignite in air on contact with a source of ignition.
such as Paints, thinner, adhesives;
4.1
8

Flammable solids

Substances that are easily ignited by external sources, such as sparks and flames.
such as "strike anywhere matches" and articles which are easily ignited
Class 4
4.2
9

Substances liable to spontaneous combustion

Substances likely to heat spontaneously and catch fire.
Class 4
4.3
6

Substances that in contact with water emit flammable gases

Substances that produce dangerous quantities of flammable gas when in contact with water. Heat from this reaction may cause their gases to spontaneously ignite.
Class 5
5.1
7

Oxidizing substances

Substances that are not necessarily combustible by themselves, but which produce oxygen, which increases the risk and intensity of fire in other materials with which they may come in contact.
such as bleaching powder and peroxides;
Class 5
5.2
7

Organic peroxides

Organic substances containing bivalent oxygen that are thermally unstable and likely to react dangerously with other substances.
Class 6
6.1
4

Toxic substances

Substances likely to cause death or serious injury if swallowed, inhaled or brought into contact with the skin.
Class 6
6.2
4

Infectious substances

Substances known or likely to contain micro-organisms which can cause disease.
Class 7
7
- -

Radioactive material (CATEGORY I)

Material for which the specific activity exceeds 70Bq/kg.
Class 7Class 7
7
- -

Radioactive material (CATEGORY II or III)

Material for which the specific activity exceeds 70Bq/kg.
Class 8
8
3

Corrosive substances

Solid and liquid substances that can severely damage living tissue or attack other materials such as metals.
such as Mercury (which may be contained in thermometers or blood pressure gauges), acids, alkalis and wet cell batteries
Class 9
9
10

Miscellaneous dangerous goods and articles

Substances and articles that present a danger, but are not covered by other classes.