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Name: L-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. Ascorbic acid is well known for its antioxidant activity. Ascorbate acts as reducing agent to reverse oxidation in aqueous solution. When there are more free radicals (Reactive oxygen species) in the body versus antioxidant, human is under the condition called Oxidative stress. Vitamin C is the most widely taken dietary supplement. Vitamin C is available in many forms including caplets, tablets, capsules, drink mix packets, in multi-vitamin formulations, in multiple antioxidant formulations, and crystalline powder. Timed release versions are available, as are formulations containing bioflavonoids such as quercetin, hesperidin and rutin. Tablet and capsule sizes range from 25 mg to 1500 mg. Vitamin C (as ascorbic acid) crystals are typically available in bottles containing 300 g to 1 kg of powder (a teaspoon of vitamin C crystals equals 5,000 mg).
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

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