Used primarily as a skin-lightening agent in cosmetic and dermatological products to treat hyperpigmentation, melasma, and age spots. It works by inhibiting tyrosinase, an enzyme involved in melanin production, thereby reducing skin discoloration. Commonly found in creams, serums, and lotions, it is often prescribed for short-term use under medical supervision due to potential side effects with prolonged use. Also utilized in photography as a developing agent and in the polymer industry as a polymerization inhibitor.