Ascorbic Acid
Inquiry
| Post Date: | Feb 13,2015 |
| Expiry Date: | Feb 13,2016 |
| Detailed Description: |
Cas No. :50-81-7
Physical & Chemical Properties.:
It is odorless or almost odorless. It has a pleasant, sharp acidic taste. It is freely soluble in water and sparingly soluble in ethanol. It is practically insoluble in ether and chloroform. Ascorbic acid has pKa values of 4.2 and 11.6. Ascorbic acid has a melting temperature of 190°C with decomposition. A 5% solution in water has a pH of 2.2- 2.5. In impure preparations and in many natural products the vitamin oxidizes on exposure to air and light. Ascorbic acid solution is rapidly oxidized in air and alkaline media. Ascorbic acid gradually darkens upon exposure to light; however slight coloration does not impair the therapeutic activity of ascorbic acid injection. Even in the absence of light, ascorbic acid is gradually degraded on exposure to a humid atmosphere, the decomposition being faster at higher temperatures. In concentrations greater than 100 mg/mL, ascorbic acid may undergo decomposition with the production of carbon dioxide. Since increased pressure may develop after prolonged storage, ampules containing ascorbic acid injection should be opened carefully. Quality standard.: (see table) The quality conforms to BP/USP. Ascorbic Acid Quality standard Item Index Characteristic white crystalline powder Melting point 190-192 ℃ Specific rotation +21.0 Identification Conforms Assay ≥99.0% Clarity of solution Fine Colour of solution(A420nm) A≤0.03 Residue on ignition ≤0.1% Ferrite ≤2ppm Copper ≤5ppm Heavy metals ≤10ppm |
| CAS Registry Number: | 50-81-7 |
| Synonyms: | ;L-Ascorbic Acid, Free Acid;Vitamin C;L-(+)-Ascorbic acid;VC;ascorbic acid;Vita C BP2005;Vitamine C;L-threo-hex-1-enofuranos-3-ulose;(5R)-5-[(1S)-1,2-dihydroxyethyl]-3,4-dihydroxyfuran-2(5H)-one (non-preferred name);5-(1,2-dihydroxyethyl)-3,4-dihydroxyfuran-2(5H)-one (non-preferred name);Vit.C;Ascorbic Acid(VC);L-Ascorbic Acid;Ascorbate Acid;COATED ASCORBIC ACID; |
| Molecular Formula: | C6H8O6 |
| Molecular Weight: | 176.1241 |
| Molecular Structure: | 
|
| Safety Description: | S24/25:; |
| Company: | Zhengzhou Natural Chemical Co.,Ltd [ China ] |
| Contact: | Sophie |
| Tel: | +86-13525520059 |
| Fax: | +86-60193628 |
| Email: | sophie@zznccl.com |
-
Disclaimer statement:The information and data included above have been realized by the enterprises and compiled by the staff, and are subject to change without notice to you. The Chemnet makes no warranties or representations whatsoever regarding the facticity, accuracy and validity of such information and data. In order to ensure your interest, we suggest you chose the products posted by our gold suppliers or VIP members.
