Allergic contact sensitivity to quinophthalone
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H Komamura1, T Kozuka, M Ishii
1Department of Dermatology, Osaka University School of Medicine, Japan.
Contact Dermatitis
|March 1, 1989
Abstract:
A 73-year-old patient, diagnosed as having seborrheic dermatitis, was patch tested with his hair preparations. The hair stick gave a positive reaction. Among its ingredients, D & C Yellow No. 11, from 0.0001% to 0.1%, and perfume showed positive reactions. D & C Yellow No. 11 was found to consist only of quinophthalone by chemical analyses. The concentration of quinophthalone in the hair stick was determined as 9.41 ppm w/w by high-performance liquid chromatography.