According to the material of the electronic ability strong or weak, it can be divided into weak strong oxidizer, moderate  and antioxidant, with a general description of its performance in the REDOX reaction.However this category boundaries are fuzzy, sometimes with oxygen (O2 / H2O, E ∅ = 1.229 V [2]) and iron (Fe3 + / Fe2 +, E ∅ = 0.771 V [2]) is bounded, oxidizing than oxygen species as a strong oxidizer, weaker than iron ion for weak antioxidant, in between for moderate antioxidant.

According to its size, risk is divided into primary antioxidants and secondary antioxidant.

Oxidant in accordance with the chemical composition is divided into organic and inorganic oxidants oxidant.But also in accordance with the required by the oxidation reaction medium is divided into the following three categories:

(1) acid medium oxidant (hydrogen peroxide, acetic acid peroxide and sodium dichromate, chromic acid, nitric acid, potassium permanganate, ammonium persulfate).

(2) the alkaline medium oxidant (sodium hypochlorite, sodium percarbonate, sodium perborate, boric acid potassium).

(3) neutral antioxidant (bromine, iodine).

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