Contactants in 'Kum-Kum' dermatitis.

Twenty patients having contact dermatitis on the forehead due to Kum-Kum were patch tested with the commercially available Kum-Kum used by the patient as such, and also the extended European standard series of allergens, as well as brilliant lake red R, sudan I, aminoazobenzene and canaga oil since analysis of the Kum-Kum by thin-layer chromatography showed presence of these constituents. Patch tests were positive in all the patients with the commercial Kum-Kum and brilliant lake red R, sudan I, aminoazobenzene and canaga oil, but not with the extended European standard series of allergens.