Permanent dyes diamines

Oxidation dyes are often referred to as permanent hair dyes and are the most important of the commercial hair dyes. Permanent hair dyes generally consist of p-diamines and p-aminophenols that are oxidized by hydrogen peroxide to active intermediates [3]. These active intermediates then react inside the hair with color couplers to provide shampoo-resistant hair dyes. 

Semi permanent. A long list of dyes may be used, i.e. 4-nitro-2-phenylene diamine, 2-amino-3-nitrophenol, 1,4 diamino anthraquinone... 

Synonyms 2-methyl-i,4-benzenediamine sulfate (1 1) 2,5-diaminotoluene sulfate (1 1) p-toluenediamine sulfate (1 1) toluene-2,5-diamine sulfate(i i) 2,5-diaminotoluene sulfate 2,5-toluenediamine sulfate (1 1) toluene-2,5-diamine sulfate C.I. 76042 Uses primary intermediate in various permanent hair dyes. TOLUENE-2,5-DIAMINE SULFATE A... 

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