Biotin Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S24/25:Berührung mit den Augen und der Haut vermeiden.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
White powder
Verwenden
Growth factor present in minute amounts in every living cell. Plays an indispensable role in numerous naturally occurring carboxylation reactions. Occurs mainly bound to proteins or polypeptides. The
richest sources are liver, kidney, pancreas, yeast, and milk. The biotin content of cancerous tumors is higher than that of normal tissue.
Definition
ChEBI: An organic heterobicyclic compound that consists of 2-oxohexahydro-1H-thieno[3,4-d]imidazole having a valeric acid substituent attached to the tetrahydrothiophene ring. The parent of the class of biotins.
Allgemeine Beschreibung
Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.
Biotin is a water-soluble vitamin, essential for amino acids and carbohydrates metabolism. It is involved in
de novo synthesis of purine nucleotides and plays a role in gene expression and DNA replication.
Sicherheitsprofil
An experimental
teratogen. Experimental reproductive
effects. When heated to decomposition it
emits toxic fumes of NOx and SOx.
läuterung methode
D-(+)-Biotin crystallises from hot water in fine long needles with a solubility of 22 mg/100mL at 25o. Its solubility in 95% EtOH is 80 mg/100 mL at 25o. Its isoelectric point is at pH 3.5. Store solid and solutions under sterile conditions because it is susceptible to mould growth. [Confalone J Am Chem Soc 97 5936 1975, Wolf et al. J Am Chem Soc 67 2100 1945, Synthesis: Ohuri & Emoto Tetrahedron Lett 2765 1975, Harris et al. J Am Chem Soc 66 1756 1944.] The (+)-methyl ester has m 166-167o (from MeOH/Et2O), [] D 22 +57o (c 1, CHCl3) [du Vigneaud et al. J Biol Chem 140 643, 763 1941]; the (+)-S-oxide has m 200-203o, [] D 20 +130o (c 1.2, 0.1N NaOH) [Melville J Biol Chem 208 495 1954]; the SS-dioxide has m 274-275o(dec, 268-270o), and the SS-dioxide methyl ester has m 239-241o (from MeOH/Et2O) [Hofmann et al. J Biol Chem 141 207, 213 1941]. [Beilstein 27 III/IV 7979.]
Biotin Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
