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How to ... classify dangerous goods

Definition: A dangerous good means any substance or article prescribed as dangerous goods for the purposes of the Dangerous Goods Act 1975.

The following information is a brief introduction to the classification of dangerous goods. For full details on the classification and storage see The Storage of Dangerous Goods

Dangerous goods are classified into nine classes according to their characteristics.

Class 1 - EXPLOSIVES

Explosive substances and articles used to produce explosions or pyrotechnic effect.

This class is sub-divided into Class 1.1 (TNT, ANFO); Class 1.2 (bombs, grenades); Class 1.3 (display fireworks); Class 1.4 (toy fireworks); Class 1.5 (proprietary explosives)

Class 2 - GASES

Gases which are compressed, liquefied or dissolved under pressure.

This class is sub-divided into Class 2.1 Flammable gases (acetylene, hydrogen, LPG); Class 2.2 Non-Flammable Non-Toxic gases (nitrogen, carbon dioxide, liquid oxygen,medical air); Class 2.3 Toxic gases (ammonia, chlorine)

Class 3 - FLAMMABLE LIQUIDS

Liquids which ignite on contact with ignition sources.

This class is sub-divided by Packaging Group I (greatest danger - ether); PG II (medium danger - petrol, alcohol, acetone, thinnersd); PG III (minor danger - kerosene, turpentine)

Class 4 - FLAMMABLE SOLIDS

Gases which are combustible or emit a flammable gas when wet.

This class is sub-divided into Class 4.1 Flammable solids (nitrocellulose, magnesium, sulpur, activated charcoal, phosphorus, matches); Class 4.2 Spontaneously Combustible (sodium sulphide); Class 4.3 Dangerous When Wet (calcium carbide, zinc, alkali metals)

Class 5 - OXIDISING AGENTS and ORGANIC PEROXIDES

This class is sub-divided into Class 5.1 Oxidising agents (pool chlorine, hydrogen peroxide, ammonium nitrate; Class 5.2 Organic peroxides (benzoyl peroxides, cumene hydroperoxide)

Class 6 -TOXIC SUBSTANCES

This class is sub-divided into Packaging Group I (sodium cyanide, lead compounds); PG II (aniline, arsenic, phenol, some pesticides); PG III (lead acetate, trochloroethylene, some pesticides)

Class 7 - RADIOACTIVE SUBSTANCES

Radioactive substances comprise substances or a combination of substances which emit radiation. Examples are uranium and radioisotopes.

Class 8 - CORROSIVE SUBSTANCES

This class is sub-divided into Packaging Group I (hydroflouric acid, nitric acid); PG II (hydrochloric acid, caustic soda); PG III (phosphoric acid, liquid chlorine)

Class 9 - MISCELLANEOUS DANGEROUS GOODS

Substances which present relatively low hazards. Examples are aerosols, polyester beads.