Hydroquinone is a benzenediol comprising benzene core carrying two hydroxyl substituents para to each other. It is a white crystalline substance when pure and is highly soluble in water.
|Appearance||White Needle Crystal|
|Solubility in CH3COOH||Colorless, Transparent|
|Residue on Ignition||0.001 %|
|Heavy Metal as Pub||0.001 %|
· The largest demand for hydroquinone is as a photographic developer, principally for black-and- white film, lithography, photochemical machining, microfilm, and X-ray film.
· Hydroquinone is used as a topical application in skin whitening to reduce the color of skin.