hydroquinone
(redirected from Benzene-1,4-diol)Also found in: Dictionary, Encyclopedia.
hydroquinone
[hi″dro-kwin´ōn]a topical agent used to bleach hyperpigmented skin.
hydroquinone
/hy·dro·quin·one/ (hi″dro-kwĭ-nōn´) the reduced form of quinone, used topically as a skin depigmenting agent.hydroquinone
(hī′drō-kwĭ-nōn′, -kwĭn′ōn′) alsohydroquinol
(-kwĭn′ôl′, -ōl′)n.
A white crystalline phenol, C6H6O2, used as an antioxidant, photographic developer, stabilizer, and reagent.
hydroquinone
[hī′drōkwin′ōn]
a dermatological bleaching agent.
indications It is prescribed to reduce pigmentation of the skin in certain conditions in which an excess of melanin causes hyperpigmentation.
contraindications Sunburn, prickly heat, other irritation of the skin, or known hypersensitivity to this drug prohibits its use.
adverse effects Among the more serious adverse effects are tingling, erythema, burning, and severe inflammation of the skin.
hydroquinone (hīdrōkwin´ōn),
n 1. a reducing agent used as an inhibitor in resin monomers to prevent polymerization during storage.
n 2. one of the two chemicals used as reducing agents in film-developing solutions. It is made from benzene (paradihydroxybenzene) and is sensitive to thermal changes. Above 70° F (21° C), the action of hydroquinone is rapid; below 60° F (15.5° C), hydroquinone becomes inactive. Its action is to control the contrast of the film.
n 2. one of the two chemicals used as reducing agents in film-developing solutions. It is made from benzene (paradihydroxybenzene) and is sensitive to thermal changes. Above 70° F (21° C), the action of hydroquinone is rapid; below 60° F (15.5° C), hydroquinone becomes inactive. Its action is to control the contrast of the film.
hydroquinone
thought at one time to be the toxic component of Xanthium spp., a now discredited view.