Hazard Labels

Singapore freight forwarders – Star Concord

Hazard Labels

Dangerous Goods

For ease of identification of dangerous goods, the international community has created a classification system. All dangerous goods are included in one of nine primary classes. In some cases it has also been necessary to sub-divide some of the classes into divisions in order to adequately provide for the dangers of the individual goods. There is a label for each class/division to categories the nature of the hazard. These labels must be affixed to the outside of the package when it ts offered for transport and must remain on the package while itis in transit. Some examples of these are illustrated below:

Class 1 Explosives –

Explosive substances, explosive articles, pyrotechnic devices. Includes ammunition, fireworks, detonators, etc

Class 2 Gases –

Transported as either compressed, liquefied, refrigerated liquefied or gas in solution. Includes aerosols. This class has three divisions:

  • Division 2.1 – flammable gases i.e. butane, propane
  • Division 2.2
    – non-flammable, non-toxic gases i.e.
    oxygen, liquid nitrogen, compressed air
  • Division 2.3 – toxic gases i.e. chlorine, coal gas.
Class 3 Flammable liquids –

Icludes liquids with a boiling point of 35 degrees C or less or a flash point of 60 degrees C or less. Examples are Petrol, Alcohol, etc

Class 4 Flammable solids –

Substances liable to spontaneous combustion and substances which, in contact with water, emit flammable gases. Class 4 has 3 divisions:

Division 4.1 –

flammable solids such as hexamine solid fuel tablets for camping stoves; self-reactive substances and desensitized explosives.

Division 42 –

Substances liable to spontaneous combustion under the normal conditions encountered in air transport – such as Phosphorus which burns by itself when exposed to air.

Class 4.3 –

substances which in contact with water emit flammable gases. i.e. “Dangerous when wet”. Examples are sodium, zinc particles etc.

Class 5.1 Oxidising substances –

substances which in themselves are not necessarily combustible, but which by yielding oxygen may cause or contribute to the combustion of other material. Example is generators which produce oxygen by chemical reaction.

Class 5.2 Organic peroxides –

these are thermally unstable substance which may undergo heat generating, self accelerating decomposition – which may be explosive, rapid, sensitive to impact or friction or react dangerously with other substances. Example is Hydrogen Peroxide

Class 6.1 Toxic substances –

those substances which are liable to cause death or injury if swallowed, inhaled or absorbed through the skin. Examples are pesticides and poisons

Class 6.2 infectious substances

those known to contain, or reasonably expected to contain, pathogens.

Class 7 Radioactive material
Class 8 Corrosives

substances which, in the event of leakage, can cause severe damage by chemical action when in contact with living tissue or materially damage other freight, containers or the aircraft. Examples are Mercury, Battery acids, etc

Class 9 Miscellaneous –

includes magnetic articles, which can have an impact on the aircraft’s compass, Internal combustion engines, dry ice (solid carbon dioxide) etc.

There are four handling labels available for to use in conjunction with the appropriate labels shown in the above list. These are as follows:


used on liquefied gases

Magnetic Material
This Way Up
Cargo Aircraft Only

a warning that the package must not be carried on an aircraft with passengers

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