Ascorbic acid(Cas No.50-81-7 ,Vc,Vitamin C)

FORMULA: C6H8O6
Molecular Weight: 176.13
CAS No.: 50-81-7
E-Code No.: E-300
EINECS code: 2000662
Appearance: White granular powder, melting at about 190degrees centigrade. Gradually darkens on exposure to light and/or heat, reasonably stable in air when dry, but deteriorates in solution in the presence of air. One gram is soluble in about 3ml of water and in about 30ml of alcohol. It is insoluble in chloroform, in ether, and in benzene.

SPECIFICATION (BP2004/USP28/FCCV)
Appearance: White to slightly yellowish crystalline power
Identification Positive Reaction
Clarity of Solution (5% solution) Clear
Color of Solution BY7
Assay 99.0% ~ 100.5%
Particle size (%) mesh No. 20 100
Loss on Drying < 0.2%
Residue on Ignition Max 0.1%
Specific Rotation + 20.5 ~ +21.5 degrees
pH (5% in water) 2.2 ~ 2.5
Heavy Metals (as Pb) Max. 10ppm
Lead Max. 5ppm
Zinc Max. 25ppm
Copper Max. 5ppm
Iron Max. 2ppm
Arsenic Max. 3ppm
Oxalic Acid Max. 0.2%
Shelf Life 2 Years

PACKING
Two layers of polyethylene liner in net 25kg carton or fiber drum

TOXICOLOGICAL INFORMATION
Threshold limit value: TWA: None established
STEL: None established
Toxicity: Industrial exposure, no advise clinical findings have been reported at dose levels of 9000mg/day or less, orally in man at a level of 50-80g/day for a week to 10 days, there was some gastroenteritis and anal irritation, amounts of 1g/day may cause diarrhea, 4-12g/day can cause formation of urate and cystine stones in the urinary bladder.

HANDLING PRECAUTION
Store within tightly-sealed containers in dark, moisture-free place at temperatures below 25degrees centigrade. After opening container, avoid exposing it heat and humidity.

IN CASE OF CONTACT

Eye contact: Wash surface with water thoroughly
Skin contact: Rinse areas with water thoroughly
Ingestion: Drink large quantity of water to combat the dehydrating effect.

APPLICATION AND USAGES
Vitamin C takes part in many metabolism procedures in the human body, helps decrease brittleness of blood capillaries and increase body resistance. In addition to prevention of scurvy, it is often used as a supplement for treatment of acute or chronic infection diseases or purpura.