抗坏血酸维生素C

Ascorbic Acid (Vitamin C) (50-81-7)

Formula: C6H8O6

M.W.: 176.13

Appearance: White or almost white crystals, crystalline powder

Specifications: BP2016 / USP39/FCC10/EP8.8/E300

Identification:   Positive Reaction

Melting Point:   About 190℃-192℃

PH (with 2% water solution):   2.4-2.8

PH (with 5% water solution):   2.1-2.6

Clarity of Solution:   Clear

Color o Solution:   BY7 max

Coper:   5ppm max

Heavy Metals:   10ppm max

Mercury:   0.1ppm max

Lead:   2ppm max

Arsenic:   3ppm max

Oxalic Acid:   0.2% max

Iron:   2ppm max

Impurity E:   0.2% max

Loss of Drying:   0.4% max

Sulphate Ash (Residue on Ignition):   0.1% max

Specific Optical Rotation:   +20.5° - +21.5°

Residual Solvents:   Pass

Assay:   99.0% - 100.5%

Packing: 25kg carton, 22mt/20’Fcl