Identify substances classified as dangerous goods from the following labels.

The “diamond” sign on the label shows to which of the nine classes the dangerous goods belong. This label, or diamond sign, has a distinctive symbol and colour.

In addition, some labels also show the Packing Group (abbreviated as PG), which indicates the degree of danger:

PG I - great danger,
PG II - medium danger,
PG lIl - minor danger.

Class 1 - Explosives
Substances and articles used to produce explosions or pyrotechnic effects. These include high explosives, fireworks and cartridges.

Class 2 - Gases
These are gases which have been compressed, liquefied or dissolved under pressure.

Class 2.1 - Flammable gases.
Examples: acetylene, hydrogen, liquefied petroleum gas (LP Gas).

Class 2.2 - Non-flammable, non-toxic gases. Examples: oxygen, nitrogen, air, argon.

Class 2.3 - Toxic gases: gases liable to cause death or serious injury to human health if inhaled.
Examples: ammonia, chlorine, carbon monoxide.

Class 3 - Flammable liquids
These are liquids, mixtures of liquids or liquids containing solids in suspension, which in most instances can be ignited and will burn.

Class 3 PG I - Flammable liquids with a flashpoint less than 23°C and an initial boiling point not greater than 35°C.
Examples: diethyl ether, carbon disulfide.

Class 3 PG II - Flammable liquids with a flashpoint less than 23°C and an initial boiling point greater than 35°C.
Examples: petrol, acetone, paint thinners.

Class 3 PG lIl - Flammable liquids - liquids with a flashpoint of 23°C or more, but less than or equal to 60.5°C.
Examples: kerosene, mineral turpentine.

Containers of combustible liquids (such as oils), with a flashpoint over 60.5°C, are not required to be marked. Examples are diesel fuel and lubricating oils.

Class 4 - Flammable solids

Class 4.1 - Flammable solids, self-reactive and related substances and desensitized explosives - solids easily ignited and readily combustible.
Examples: nitrocellulose, phosphorus, matches.

Class 4.2 - Substances liable to spontaneous combustion.
Examples: aluminium alkyls, white phosphorus.

Class 4.3 - Substances which emit flammable gases when in contact with water.
Examples: aluminium phosphide, calcium carbide

Class 5 - Oxidizers

Class 5.1 - Oxidizing agents.
Examples: hydrogen peroxide, calcium hypochlorite (dry pool chlorine), ammonium nitrate.

Class 5.2 - Organic peroxides (liquid or solid).
Examples: methyl ethyl ketone peroxide, dibenzoyl peroxide, cumyl hydroperoxide.

Class 6 - Toxic and infectious substances

These are poisonous (toxic) and infectious substances (excluding toxic gases which are in class 2.3).

Class 6.1 - Toxic substances. These are liable to cause death or serious injury to human health if inhaled, swallowed or absorbed through the skin.
Examples: cyanides, arsenic compounds.

Class 6.2 - Infectious substances. These are substances containing viable micro-organisms that are known or believed to cause disease in humans or animals.
Examples: viruses, pathology specimens.

Class 7 - Radioactive substances

These emit ionising radiation. Examples are radioisotopes used in medicine.

Class 8 - Corrosives

These are substances (either solids or liquids) which will damage living tissue, goods or equipment on contact, by chemical action. Examples: hydrochloric acid, sodium hypochlorite (liquid pool chlorine), sodiumhydroxide (caustic soda).

Class 9 - Miscellaneous dangerous goods

These are substances and articles which have potentially dangerous properties that are relatively minor. Examples: polyester beads, polychlorinated biphenyls.