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Ascorbic Acid

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period for delivery: Consignment Deadline Days
area: Beijing
Expiry date : Long Effective
last update: 2017-12-21 06:02
view count: 95
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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. In solid state it is stable in air.Its water solution is easliy mutated when it meets with air. Ascorbic acid is one form ("vitamer") of vitamin C. 

It was originally called L-hexuronic acid, but, when it was found to have vitamin C activity in animals ("vitamin C" being defined as a vitamin activity, not then a specific substance), the suggestion was made to rename it. The new name, ascorbic acid, is derived from a- (meaning "no") and scorbutus (scurvy), the disease caused by a deficiency of vitamin C. Because it is derived from glucose, many non-human 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 some primates, guinea pigs, teleost fishes, bats, and some birds, all of which require it as a dietary micronutrient (that is, in vitamin form). 

Usage: 

In the pharmaceutical industry,can be used to treat  scurvy and various acute and chronic infections diseases,are applicable to the lack of VC,In the food industry,it can both use as nutrition-al supplements,supplementary VC in food processing,and also is good Antioxidants in food preservation,widely used in meat products, fermented flour products,beer,tea dtinks, fruit juice,canned fruit,canned meat and so on;also commonly used in cosmetics,feed additives and other industrial areas.

1. Promote collagen biosynthesis. Good for organization and the faster healing wounds

2. Improve the metabolism of the amino acid tyrosine and tryptophan, extend the life of the body.

3. Improve the use of iron, calcium and folic acid.

4. Improving fat metabolism and lipid especially cholesterol, prevent cardiovascular disease.

5. Promote the growth of teeth and bones, prevent bleeding gums, prevent joint pain, waist and leg pain.

6. Strengthen the body to the external environment of the anti-stress ability and immunity.

7. Water-soluble powerful antioxidant, and the main role in aqueous solution in the body.

8. Strong connective tissue.

9. Promote the synthesis of collagen, prevent bleeding gums.

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 

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