Hydroquinone (1,4-Benzenediol, 1,4-Dihydroxybenzene) is usually associated with use in skin lighteners. It works by decreasing the production of melanin pigments in the skin. This product appears as a white to white-grayish powder.

对苯二酚（1,4-苯二酚，1,4-二羟基苯）通常用于皮肤美白剂。它通过减少皮肤中黑色素的产生来起作用。该产品呈白色至灰白色粉末。