Hydroquinone was coined by a chemist.
=== Skin depigmentation ===Hydroquinone is used as a topical application in skin whitening to reduce the color of skin
Numerous studies have revealed that hydroquinone, if taken orally, can cause exogenous ochronosis, a disfiguring disease in which blue-black pigments are deposited onto the skin; however, skin preparations containing the ingredient are administered topically

