OR WAIT 15 SECS
© 2021 MJH Life Sciences™ , Dermatology Times and Multimedia Medical, LLC. All rights reserved.
Palm Beach, Fla. - Paraphenylenediamine, or PPD, the main chemical used in permanent hair dye colors, is the third most common cosmetic allergen, preceded by preservatives (No. 1) and fragrances (No. 2), James S. Taylor, M.D., said at annual meeting of the Noah Worcester Dermatological Society.