Search results
Results from the WOW.Com Content Network
Hydroquinone and its derivatives can also be prepared by oxidation of various phenols, such as aniline and DIPB. [18] Examples include Elbs persulfate oxidation and Dakin oxidation. Hydroquinone was first obtained in 1820 by the French chemists Pelletier and Caventou via the dry distillation of quinic acid. [19] Hydrolysis of chlorophenol. [18]
[18] [19] Hydroquinone was the most commonly prescribed hyperpigmentation treatment before the long-term safety concerns were raised, [20] and the use of it became more regulated in several countries and discouraged in general by WHO. [21] For the US, only 2% is at present sold over-the-counter, and 4% needs prescription.
Hydroquinone is a commonly used agent in skin whiteners. The European Union banned it from cosmetics in 2000. [9] It works by decreasing melanin production. [9] Tretinoin, also known as all-trans retinoic acid, may be used to whiten specific areas. [6] It may be used in combination with steroids and hydroquinone. [6]
For premium support please call: 800-290-4726 more ways to reach us
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The European Food Safety Authority (EFSA) and the United States Food and Drug Administration (FDA) [3] have evaluated TBHQ and determined that it is safe to consume at the concentration allowed in foods. [4] The FDA [5] and European Union [4] both set an upper limit of 0.02% (200mg/kg) of the oil or fat content in foods. At very high doses, it ...
If you love Scrabble, you'll love the wonderful word game fun of Just Words. Play Just Words free online!
Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.