ビタミンH

ビタミンH 化学特性,用途語,生産方法

• 定義

  本品は、次の化学式で表される複素環式化合物である。

• 解説

  ビタミンB群の一つ．ビタミンH，補酵素Rともいう．炭酸固定反応の補酵素となる．卵白に含まれるアビジンと結合するため，たとえばネズミに生の卵白を多量に与えるとビオチン欠乏症が起こる．

• 化粧品の成分用途

  ヘアコンディショニング剤、皮膚コンディショニング剤

• 物理的性質

  Appearance: biotin is a white crystalline substance. Stability: it is fairly stable to air, heat, and light in dry form. In solution, however, it tends to degrade under strongly acidic or basic conditions. In the eight possible stereoisomers of biotin, only the (+)-isomer (called d-biotin) has biological activity. Biotin is covalently bound to its enzymes by an amide bond to the ε-amino group of a lysine residue and C-2 of the thiophane nucleus. The biotin molecule is activated by polarization of the O and N-1’atoms of the ureido nucleus. This leads to increased nucleophilicity at N-1′, which promotes the formation of a covalent bond between the electrophilic car bonyl phosphate formed from bicarbonate and ATP, and allows biotin to serve as a transport agent for CO2.

• 使用

  biotin (biotine; vitamin B7/vitamin H) is anti-seborrhoeic. Some cosmetic manufacturers claim biotin has healing properties and as such, is a good ingredient for treating acne skin. Biotin is also part of the B complex group of vitamins (specifically vitamin B7). A deficiency of this vitamin has been associated with greasy scalp and baldness. Its deficiency in humans is considered extremely rare, and the value of external applications through the use of cosmetic products is questionable.

• brand name

  Bioepiderm (Sterling Winthrop).

ビタミンH 生産企業

Global(138)Suppliers

ビタミンH スペクトルデータ(IR1、IR2、MS)

22879-79-4, ビタミンH キーワード