ABSTRACTTwelve fragrance materials were patch tested on patients with various facial dermatoses at three different concentrations to determine suitable concentrations of these materials for patch testing.The results indicate that 2% rose oil, 10% oil of bergamot, 5% jasmine absolute, 10% ylang ylang oil, 5% benzyl alcohol, 2% benzyl salicylate, 2% sandalwood oil, 2%αandβsantalol, 2% isobornyl cyclohexanol, 5% hydroxycitronellal, 5% eugenol and 1% trans‐isoeugenol in white petrolatum are the optimal concentrations for testing, showing good accord with those recommended by ICDRG except for jasmine absolute, ylang ylang oil, and trans‐isoeugenol, which should be retested at concentrations lower than the range used in the present