Class 1 - Explosives

  • Explosives are materials or items which have the ability to rapidly conflagrate or detonate as a consequence of a chemical reaction.


  • Division 1.1: Substances and articles which have a mass explosion hazard

  • Division 1.2: Substances and articles which have a projection hazard but not a mass explosion hazard

  • Division 1.3: Substances and articles which have a fire hazard and either a minor blast hazard or a minor projection hazard or both

  • Division 1.4: Substances and articles which present no significant hazard; only a small hazard in the event of ignition or initiation during transport with any effects largely confined to the package

Class 4 - Flammable Solids; Substances Liable to Spontaneous Combustion; Substances which Emit Flammable Gases when in contact with water

  • Flammable solids are materials which, under conditions encountered in transport, are readily combustible or may cause or contribute to fire through friction, self-reactive substances which are liable to undergo a strongly exothermic reaction or solid desensitized explosives. Also included are substances which are liable to spontaneous heating under normal transport conditions, or to heating up in contact with air, and are consequently liable to catch fire and substances which emit flammable gases or become spontaneously flammable when in contact with water.


  • Division 4.1: Flammable solids

  • Division 4.2: Substances liable to spontaneous combustion

  • Division 4.3: Substances which, in contact with water, emit flammable gases

Reason for Regulation

  • Flammable solids are capable of posing serious hazards due to their volatility, combustibility and potential in causing or propagating severe conflagrations.

Class 5 - Oxidizing Substances; organic Peroxides

  • Oxidizers are defined by dangerous goods regulations as substances which may cause or contribute to combustion, generally by yielding oxygen as a result of a redox chemical reaction. Organic peroxides are substances which may be considered derivatives of hydrogen peroxide where one or both hydrogen atoms of the chemical structure have been replaced by organic radicals.


  • Division 5.1: Oxidizing substances

  • Division 5.1: Organic peroxides

Reason for Regulation

  • Oxidizers, although not necessarily combustible in themselves, can yield oxygen and in doing so cause or contribute to the combustion of other materials. Organic peroxides are thermally unstable and may exude heat whilst undergoing exothermic autocatalytic decomposition. Additionally, organic peroxides may be liable to explosive decomposition, burn rapidly, be sensitive to impact or friction, react dangerously with other substances or cause damage to eyes.

Class 6 - Toxic Substances; Infectious Substances

  • Miscellaneous dangerous goods are substances and articles which during transportation present a danger or hazard not covered by other classes. This class encompasses, but is not limited to, environmentally hazardous substances, substances that are transported at elevated temperatures, miscellaneous articles and substances, genetically modified organisms and micro-organisms and (depending on the method of transport) magnetized materials and aviation regulated substances.


  • There are no subdivisions within Class 9, Miscellaneous Dangerous Goods.

Reason for Regulation

  • Miscellaneous dangerous goods present a wide array of potential hazards to human health and safety, infrastructure and/ or their means of transport.