Ascorbic Acid

Ascorbic Acid

Product Name:Ascorbic Acid

Another Name:

CAS:200-066-2

Molecular Weight:176.13

Molecular Formula:C6H8O6

The vitamin c Atlas (5) [1] appearance: colorless crystals Melting point: 190 - 192 ℃ Boiling Point: (none) UV absorption maximum: 245nm Fluorescence spectra: excitation wavelength: none; fluorescent wavelength: no Solubility: water-soluble vitamins Specific rotation: +20.5 ° to +21.5 ° [2] Chemical properties Name: Ascorbic Acid [3] Alias: ascorbic acid CAS No:50-81-7 EINECS No:200 -066-2 MF: C6H8O6 The InChI coding: InChI = 1/C6H8O6/c7-1-2 ⑻, 5-3 ⑼ 4 ⑽ 6 ⑾ 12-5/h2 ,5,7-10H 1H2/t2-, 5 + / m0/s1 Molecular Weight: 176.13 IUPAC name: 2,3,4,5,6 - pentahydroxyhexyl -2 - hexenoate -4 - lactone Acidic, having a strong reduction decomposition heating or in the solution is easily oxidized, is more susceptible to oxidation under alkaline conditions, of a hexose derivative.

Determination of vitamin C 1) iodimetry C6H8O6 (vitamin C, ascorbic acid) + I2 (iodine) = C6H6O6 (dehydroascorbate) + hi (iodide, hydrogen) Five membered ring of the hydroxy-dehydrogenation.

2) 2,6 - dichlorophenol indophenol titration After calibration of 2,6 - dichlorophenol indophenol solution in a 1% solution of oxalic acid vitamin c extract titration, when the titration end point is reached, the solution changes from colorless (or white) to light red.