Iamsumang W.Bertilsson K.Dahlin J.Promsena P.Srisuwanwattana P.Svetvilas P.Wattanakrai P.Antelmi A.Svedman C.Sukakul T.Mahidol University2025-05-292025-05-292025-01-01Contact Dermatitis (2025)01051873https://repository.li.mahidol.ac.th/handle/123456789/110405We report three cases of contact allergy to a mislabelled hair dye product. A hair dye product labelled as p-phenylenediamine-free has been found to contain p-phenylenediamine by a chemical analysis at the level above the limits allowed in the product.MedicineArticleSCOPUS10.1111/cod.148132-s2.0-10500579254216000536