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Vitamin C, also known as ascorbic acid and L-ascorbic acid, is a vitamin found in food and used as a dietary supplement. As a supplement it is used to treat and prevent scurvy. Evidence does not support use in the general population for the prevention of the common cold.
| ITEM | STANDARD |
| Appearance | White or almost white crystal or crystalline powder |
| Identification | Positive |
| Melting point | 191 ℃ ~ 192℃ |
| pH (5%, w/v) | 2.2 ~ 2.5 |
| pH (2%,w/v) | 2.4 ~ 2.8 |
| Specific optical rotation | +20.5° ~ +21.5° |
| Clarity of solution | Clear |
| Heavy metals | =<0.0003% |
| Assay (as C 6H 8O6, %) | 99.0 ~ 100.5 |
| Copper | =<3 mg/kg |
| Iron | =<2 mg/kg |
| Mercury | =<1 mg/kg |
| Arsenic | =<2 mg/kg |
| Lead | =<2 mg/kg |
| Oxalic acid | =<0.2% |
| Loss on drying | =<0.1% |
| Sulphated ash | =< 0.1% |
| Residual solvents (as methanol) | =< 500 mg/kg |
| Total plate count (cfu/g) | =< 1000 |
| Yeasts & molds (cfu/g) | =< 100 |
| Escherichia. Coli/g | Absence |
| Salmonella/ 25g | Absence |
| Staphylococcus aureus/ 25g | Absence |
【Introduction】 Ascorbic acid (Vitamin C) deficiencies are well documented. Deficiencies include internal and external hemorrhages, reduced bone collagen, lower jaw erosion, anemia, structural deformities, fin erosion, scoliosis (bent-back), poor growth, mortalities etc.
