Ascorbic acid
Synonyms:
Vitamin C; L-Threo-2,3,4,5,6-pentahydroxy-1-hexenoic acid-4-lactone
Molecular Formula: C6H8O6
Molecular Weight: 176.12
CAS Number: 50-81-7
EINECS: 200-066-2
Ascorbate (an ion of ascorbic acid) is required for a range of essential metabolic
reactions in all animals and plants. L-ascorbic acid is made internally by almost
all organisms, humans being a notable exception. Deficiency in this vitamin causes
scurvy in humans. Vitamin C is also widely used as a food additive.
Specification: BP2005/USP29
Item | Specification |
Characteristics | White crystalline powder |
Identification | Positive reaction |
Melting point | About 190 |
pH | 2.1 ~ 2.6 |
Clarity of solution | Clear |
Color of solution | BY7 Max. |
Iron | 2ppm Max. |
Copper | 5ppm Max. |
Arsenic | 3ppm Max. |
Oxalic acid | 0.2% Max. |
Heavy metals | 10ppm Max. |
Sulphated ash | 0.1% Max. |
Specific optical rotation | +20.5 ~ +21.5º |
Assay | 99.0 % Min. |
Packing:
Net weight 25kg cardboard cartons /drums lined with a layer of craft paper and
two layers of plastic bags.
Storage:
stored in closed containers,keep away from light and heat
Shelf life:2years
