Ascorbic acid is a naturally occurring organic compound with antioxidant properties. It is a white solid, but impure samples can appear yellowish. It dissolves well in water to give mildly acidic solutions. Because it is derived from glucose, many animals are able to produce it, but humans require it as part of their nutrition. Other vertebrates which lack the ability to produce ascorbic acid include other primates, guinea pigs, teleost fishes, bats, and some birds, all of which require it as a dietary micronutrient (that is, in vitamin form).
| Items |
Standards |
| Characteristics |
White or almost white, crystalline powder or colorless crystals |
| Melting point |
189ºC~193ºC |
| Special optical rotation |
20.5º~+21.5º |
| Apperance of solution |
Solution S is clear and not more intensely cloured than reference solution BY7 |
| Heavy metals |
≤10ppm |
| Iron |
10ppm |
| Assay |
99.0%~100.5% |
| Copper |
≤5ppm |
| Iron |
≤2ppm |
| Mercury |
≤1ppm |
| Arsenic |
≤3ppm |
| Lead |
≤2ppm |
| Oxalic acid(impurity E) |
≤0.2% |
| Loss on drying |
≤0.4% |
| Sulphated ash |
≤0.1% |
| PH(2%,W/V) |
2.4~2.8 |
| Methanol |
≤3000ppm |
| TAMC |
≤1000cfu/g |
| TYMC |
≤100cfu/g |
| E. Coli |
Absence |
Package: 25kgs/carton
ACKING AND STORAGE
Net 25kg carton or fiber drum, lined with two layers of PE liner, or as customer required.
Stored in tightly sealed container in dry and cool place below 45 degrees centigrade. Free from contact with oxidizers, Alkalis, Iron, copper and protected from light. Avoid exposure to high temperature and humidity.
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