Drometrizole is a benzotriazole derivative used as an ultraviolet (UV) light absorber and stabilizer in cosmetics. Drometrizole is used widely as a UV absorber and stabilizer in plastics, polyesters, celluloses, acrylates, dyes, rubber, synthetic and natural fibers, waxes, detergent solutions, and orthodontic adhesives. It is similarly used in agricultural products and insecticides. Drometrizole is approved as an indirect food additive for use as an antioxidant and/or stabilizer in polymers. Short-term studies using rats reported liver weight increases, increases in the activities of enzymes aminopyrine N-demethylase, and UDP glucuronosyl- transferase, but no significant effects were noted in the activities of acid hydrolases or in hepatocyte organelles. Drometrizole and products containing Drometrizole were nontoxic in acute oral, inhalation, and dermal studies using animals. Although there are case reports in which Drometrizole was considered the sensitizing agent, clinical tests of cosmetic products containing 0.03% to 1.0% Drometrizole produced no irritation, sensitization, photosensitization, or phototoxicity in a total of 436 subjects.