ABSTRACT
Commercial hair coloring products contain a mixture of p-phenylenediamine, benzenediols, aminophenols and other activated aromatic substrates which are dye precursors involved in the process of hair dyeing. It is well reported that these dye products are of health concern due to risks of allergic dermatitis, nephrotoxic and carcinogenic effects (Nohynek et al. 2005). In Chinese hygienic standard for cosmetics, OPD, MPD are forbidden to add (The ministry of health of the People’s Republic of China, 2007). The norms for determining oxidation type dye in hair dye is high performance liquid chromatography. But it not suitable for rapid TLC method.
