noun
definition
The diphenol para-dihydroxy benzene, used as a mild reducing agent in photographic developing; isomeric with catechol and resorcinol.
Examples of hydroquinone in a Sentence
All four mono-hydroxyxanthones are known, and are prepared by heating salicylic acid with either resorcin, pyrocatechin or hydroquinone; they are yellow crystalline solids, which act as dyestuffs.
On fusion with caustic potash it decomposes with formation of tetrahydroxy-benzophenone, which then breaks up into resorcin and hydroquinone.
Free hydroxylamine reduces it to hydroquinone.
Quinhydrone, C 6 H40 2 -C 6 H 4 (OH) 2, is formed by the direct union of quinone and hydroquinone or by careful oxidation of hydroquinone with ferric chloride solution.
On boiling with water it decomposes into quinone and hydroquinone.
Photographic developers often contain hydroquinone and these are also well worth investigating.
In the alkaline environment of the urine, arbutin is converted into another chemical, called hydroquinone, which kills bacteria.
These creams contain the chemical Hydroquinone, which is under question with the FDA for potentially causing cancer and other skin ailments.
If they bother you, you can cover them with concealing makeup or try a gentle bleaching agent containing hydroquinone.
For example, the C-Clarifying Serum contains 10 percent prescription strength vitamin C and four percent prescription strength hydroquinone to promote a brighter, more even skin tone.
Hydroquinone is listed as the first ingredient on the label.
Hydroquinone, however, has been flagged by Good Guide as a chemical that can cause irritation.
The active ingredients in the fading creams are hydroquinone for fading and the sunscreen octinoxate.
If you want to hasten the process, use over-the-counter skin creams designed to lighten dark spots; many of these contain hydroquinone, a bleaching ingredient.
While scars eventually fade on their own, people with deep complexions may want to speed the process along with products containing hydroquinone.
Over-the-counter skin bleaches don't contain as much of the active ingredient hydroquinone as prescription bleaches and may be used in less severe cases.