Benzoyl Peroxide
 

Chemical Properties

Percent Composition by Mass Percent Composition by Number
69.42% Carbon 50% Carbon
4.16% Hydrogen 35.71% Hydrogen
26.42% Oxygen 14.29% Oxygen

Structure:
Peroxides consist of the peroxide group (-O-O-), chain-like structure, which contain two oxygen atoms. Both oxygen atoms are connected to each other or another radical or element. In the case of Benzoyl Peroxide the oxygen atoms are linked to Carbon atoms.
Benzoyl peroxide consists of two benzoyl groups linked by a peroxide chain. The atoms in the Benzoyl Peroxide are all covalently bonded because they are all non-metals.

Reaction tendencies:

Benzoyl peroxide decomposes very quickly. The half-life of benzoyl peroxide is one hour at 92°C, and at 131°C, the half-life is one minute. Exposing benzoyl peroxide to heat, light, shock, or friction runs the risk of fire or explosion. This high risk is due to the fact that benzoyl peroxide is an oxidizer, so when it is exposed to elevated temperatures it evolves oxygens which promotes combustion. It will react forcefully with incompatible substances such as acids, bases, heavy metals, metal oxides, accelerators, organic matter, and reducing agents. To prevent reactions from occurring benzoyl peroxide should be stored in a dry and refrigerated area.
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See also: www.allatoms.com