Hair dyes are widely used as cosmetic agents to color the grey hair around the world. Pphenylenediamine (PPD) induced genotoxicity due to dermal application was investigated in this study. 90 rats conducted this study and were classified into main 4 groups. Negative control group, positive control group. In-addition, two toxicity groups; short term toxicity group and long term toxicity group. Both toxicity groups were further subdivided according to PPD dose into 10 and 15 mg/kg subgroups. The results showed that repeated dermal exposure to PPD induced significant DNA damage in peripheral blood lymphocytes in dose and time dependent manner.