Vitamin C Ascorbic Acid Powder - White Crystalline Powder, 99.0% Assay, Melting Point 191-192â°c | Stable In Air, Easily Soluble In Water

Our provided Vitamin C Ascorbic Acid Powder is a white or slightly yellow crystals or powder,a little acid.m.p.190a -192a i easily soluble in water,a little soluble in alcohol and uneasily soluble in Ether and chlorofom and other organic solvent.In solid state it is stable in air.Its water solution is easliy mutated when it meets with air.

Ascorbic Acid Powder Specifications
ITEMSTANDARD
AppearanceWhite or almost white crystal or crystalline powder
Identification Positive
Melting point 191 A C ~ 192A C
pH (5%, w/v) 2.2 ~ 2.5
pH (2%,w/v) 2.4 ~ 2.8
Specific optical rotation +20.5A ~ +21.5A
Clarity of solutionClear
Heavy metalsa 0.0003%
Assay (as C 6H 8O6, %) 99.0 ~ 100.5
Coppera 3 mg/kg
Irona 2 mg/kg
Mercurya 1 mg/kg
Arsenica 2 mg/kg
Leada 2 mg/kg
Oxalic acida 0.2%
Loss on dryinga 0.1%
Sulphated asha 0.1%
Residual solvents (as methanol)a 500 mg/kg
Total plate count (cfu/g)a 1000
Yeasts & molds (cfu/g)a 100
Escherichia. Coli/g Absence
Salmonella/ 25g Absence
Staphylococcus aureus/ 25g Absence