DEHYDROASCORBIC ACID
| Price | USD1.00 |
| Packge | 1kg |
- Min. Order:1g
- Supply Ability:100KG
- Time:2019-07-06
Product Details
- Product NameDEHYDROASCORBIC ACID
- CAS No.490-83-5
- EINECS No.207-720-6
- MFC6H6O6
- MW174.11
- InChIKeySBJKKFFYIZUCET-JLAZNSOCSA-N
- AppearanceSolidWhite to Dark Orange
- storage temp. -20°C
- Melting point 228 °C (dec.)(lit.)
- Boiling point 389.3±38.0 °C(Predicted)
- density 1.743±0.06 g/cm3(Predicted)
| 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 |
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| 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) |
| MSDS Information |
| 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
Henan CoreyChem Co., Ltd, based on the original Zhengzhou Cote Chemical Research Institute, be brave in absorbing highly educated talents & overseas returnees; actively responded to Zhengzhou City High-tech Zone Government’s Special Care Policy, reorganized and founded in National University of Science and Technology Park, which is a high-tech, stock enterprise of high-end chemical Custom synthesis;The park was created by the People's Government of Henan Province, and proved by Ministry of Education and the National Science & Technology, taking the construction mode of "many college a park, and common development", mainly depends on Zhengzhou University and Henan University’s scientific research and talent advantage to set up Universities, scientific research institute and enterprise scientific research achievements transformation platform, to make high-tech enterprises incubate, is the new high-tech talent gathering base, high and new technology industry enterprise radiation base, colleges and universities technological innovation base.
Henan Coreychem Co., Ltd, facing global High-tech pharmaceutical raw materials, high complex new type intermediates, fine chemicals custom synthesis, scale-up production and Rare chemicals trade. Corey have well-equipped machine, strong technical force and considerate marketing team service. We also have rich experience advantage in basic research, small scale process development, scale-up, industrial technology development & production and cost control.
- Since:2014-12-17
- Address: No.967,15th Floor,Unit 7, Building 1, No.70 of DianChang Road, High-tech Development Zone, Zhengzho
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