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ASCORBIC ACID (VITAMIN C) BP2005/USP30
Formula C6H8O6
Mol. Wt: 176.13
Characteristics. White or almost white Crystals crystalline powder
Identification. Positive reaction
Melting point . About 190℃
PH . 2.1-2.6
Clarity of solution Clear
Colour of solution ≤BY7
Copper. ≤5ppm
Heavy metals . ≤10ppm
Mercury ≤1ppm
Lead. ≤2ppm
Arsenic . ≤3ppm
Oxalic Acid ≤0.2%
Loss of Drying. ≤0.4%
Sulphate ash(residue on ignition) ≤0.1%
Specific optical rotation. +20.5º ~ +21.5º
Organic volatile impurities. Pass
Assay . 99.0%-100.5%