Class 5.1 /5.2 -  Oxidizing substances and organic peroxides

Class 5 is divided into two division as follow:

Division 5.1 - Oxidizing Substances 

• Which, in themselves are not necessarily combustible, but may generally cause or contribute to the combustion of other material by yielding oxygen. Such substances may be contained in an article. 
  

Division 5.2 – Organic Peroxides

• Is made up of organic substances which contain the bivalent structure -O-O- and may be considered derivatives of hydrogen peroxide in which one or both of the hydrogen atoms have been replaced by organic radicals.
• Are thermally unstable substances which may undergo exothermic, self-accelerating decomposition.
• In addition, they may have one or more of the following properties:
  i. Be liable to explosive decomposition
  ii. Burn rapidly
  iii. Be sensitive to impact or friction
  iv. React dangerously with other substances
  v. Cause damage to the eyes