China Gold Supplier for High Quality vitamin c ascorbic acid CAS No.: 50-81-7
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It really is a good way to further improve our goods and service. Our mission would be to acquire inventive items to buyers with a very good encounter for , we sincerely hope to establish a good and long-term business relationship with your esteemed company through this opportunity, based on equality, mutual benefit and win-win business from now to the future. "Your satisfaction is our happiness".
| Appearance | White or almost white crystalline powder or colourless crystals |
| Melting point | About 190ºC |
| Specific Rotation | +20.5º~21.5º |
| PH | 2.1~2.6(in 5% solution) |
| 2.4~2.8(in 2% solution ) | |
| Residue on ignition (sulphate ash ) |
|
| Assay | 99.0%~100.5% |
| Loss on drying | ≤0.1% |
| Heavy metals | ≤10ppm |
| Lead | ≤ 2ppm |
| Mercury | ≤1ppm |
| Cadmium | ≤1ppm |
| Color of solution | ≤BY7 |
| Impurity E (oxalic acid) | ≤0.2% |
| function | Vitamin C is similar in structure to glucose. It is a polyhydroxy compound. The two adjacent enol-type hydroxyl groups in the 2nd and 3rd positions of the molecule are easily dissociated to release H+, so they have acid properties. ascorbic acid. Vitamin C has strong reducibility and is easily oxidized to dehydrogenated vitamin C, but its reaction is reversible, and ascorbic acid and dehydroascorbic acid have the same physiological functions, but dehydroascorbic acid continues to oxidize to form diketone Leuconic acid, the reaction is irreversible and completely loses physiological efficacy. |
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