Product Details
| Product Name:
DEHYDROASCORBIC ACID |
CAS No.:
490-83-5 |
| Min. Order:
1g |
Purity:
99% |
| Supply Ability:
100KG |
Release date:
2019/07/06 |
| Product::
AD68 |
| DEHYDROASCORBIC ACID Basic information |
| Product Name: |
DEHYDROASCORBIC ACID |
| Synonyms: |
(5R)-5β-[(S)-1,2-Dihydroxyethyl]tetrahydrofuran-2,3,4-trione;C05422;Dehydroascorbate;L-Dehydroascorbate;L-threo-2,3-Hexodiulosonic Acid γ-Lactone;Oxidized Ascorbic Acid;OXIDIZED VITAMIN C;L-ASCORBIC ACID OXIDIZED |
| CAS: |
490-83-5 |
| MF: |
C6H6O6 |
| MW: |
174.11 |
| EINECS: |
207-720-6 |
| Product Categories: |
Carbohydrates & Derivatives;Intermediates & Fine Chemicals;Pharmaceuticals;Carbohydrate Synthesis;Monosaccharides;Specialty Synthesis |
| Mol File: |
490-83-5.mol |
 |
| |
| DEHYDROASCORBIC ACID Chemical Properties |
| Melting point |
228 °C (dec.)(lit.) |
| alpha |
D20 +56° |
| storage temp. |
−20°C |
| pka |
3.90(at 25℃) |
| Merck |
13,2886 |
| CAS DataBase Reference |
490-83-5(CAS DataBase Reference) |
| Hazard Codes |
Xn |
| Risk Statements |
22 |
| WGK Germany |
3 |
| F |
1-8-10 |
| Provider |
Language |
| SigmaAldrich |
English |
| |
| DEHYDROASCORBIC ACID Usage And Synthesis |
| Chemical Properties |
Orange Solid |
| Uses |
The reversibly oxidized form of ascorbic acid. |
| Definition |
ChEBI: Dehydroascorbic acid having the L-configuration. |
| Purification Methods |
Crystallise dehydro-L(+)-ascorbic acid from MeOH. The anhydrous acid is formed by heating it in a vacuum at 100o/1hour to give a crisp glassy product which when shaken with absolute EtOH and then kept at 0o for 2days gives microcrystals of the anhydrous acid. This is then washed with absolute EtOH and dried in a vacuum. It has m 225o(dec) and is stable in acidic solution but decomposes rapidly in alkaline solution. A 1% solution of the anhydrous acid when dissolved in phthalate/HCl buffer pH 3.5 at 60o and cooled to 20o has [] 20D +56o(0minutes), +53.5o(2hours), +19o(3days), -2o(5days) and -6o(6days); then it becomes orange in colour. A freshly prepared 1% solution in H2O has [] D +50o(0minutes), +44o(2hours), +16o(3days) and 0o(5days). [Herbert et al. J Chem Soc 1270 1933, Kenyon et al. J Chem Soc 158 1948, Beilstein 18/5 V 411.] |
Company Profile Introduction
Established in 2014,Career Henan Chemical Co. is a manufacturerspecializing in the sale of fine chemicals.
Mainly deals in the sales of:
Pharmaceutical intermediates
OLED intermediates：
Pharmaceutical intermediates;
OLED intermediates;
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