Classes for Dangerous Goods

Class 5.1: Oxidizing substances (agents) by yielding oxygen increase the risk and intensity of fire.

IMO Classes

Class 1.
Explosives Class 2.
Gases Class 3.
Flammable Liquids Class 4.1.
Flammable Solids or Substances Class 4.2.
Flammable solids Class 4.3.
Substances which, in contact with water, emit flammable gases Class 5.1.
Oxidizing substances (agents) by yielding oxygen increase the risk and intensity of fire Class 5.2.
Organic peroxides - most will burn rapidly and are sensitive to impact or friction Class 6.1.
Toxic substances Class 6.2.
Infectious substances Class 7.
Radioactive Substances Class 8.
Corrosives Class 9.
Miscellaneous dangerous substances and articles

Oxidizing substances (agents) by yielding oxygen increase the risk and intensity of fire

Oxidizer (Division 5.1) means a material that may, generally by yielding oxygen, cause or enhance the combustion of other materials.

1. A solid material is classed as a Division 5.1 material if, when tested in accordance with the UN Manual of Tests and Criteria, its mean burning time is less than or equal to the burning time of a 3:7 potassium bromate/cellulose mixture.

2. A liquid material is classed as a Division 5.1 material if, when tested in accordance with the UN Manual of Tests and Criteria, it spontaneously ignites or its mean time for a pressure rise from 690 kPa to 2070 kPa gauge is less then the time of a 1:1 nitric acid (65 percent)/cellulose mixture.