Monobenzon is the monobenzyl ether of hydroquinone used medically for depigmentation. Monobenzon occurs as a white, almost tasteless crystalline powder, soluble in alcohol and practically insoluble in water.
The topical application of monobenzone in animals increases the excretion of melanin from the melanocytes. The same action is thought to be responsible for the depigmenting effect of the drug in humans. Monobenzon may cause destruction of melanocytes and permanent depigmentation.