Vitamin C is a a family of vitamin including ascorbic acid and its salts (Sodium Ascorbate), available as White or almost white crystal or crystalline powder. As an experienced Vitamin C manufacturer and supplier, we has been supplying and exporting Vitamin C for almost 10 years, please be assured to buy from us. Any inquiries about price and the market trend please feel free to contact us, we will reply you within 1 working day. Vitamin C Specification Items Specifications Appearance White crystalline powder Identification Positive reaction Melting point About 190 �ºC Specific rotation +20.5 â?? +21.5 �º PH value 2.1 â?? 2.6 Clarity of solution Clear Colour of solution BY7 max Heavy metals 10 ppm max Copper 5 ppm max Iron 2 ppm max Assay(on dried basis) 99.0 100.5% Residue on ignition 0.1% max Organic volatile impurities Conforms Oxalic Acid 0.2% max