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Ascorbic acid

Product Name	Ascorbic acid

CAS No.	50-81-7
Main Specification	ITEMSTANDARDAppearanceWhite or almost white crystal or crystalline powderIdentification PositiveMelting point 191 °C ~ 192°C pH (5%, w/v) 2.2 ~ 2.5 pH (2%,w/v) 2.4 ~ 2.8 Specific optical rotation +20.5° ~ +21.5° Clarity of solutionClear Heavy metals≤0.0003% Assay (as C 6H 8O6, %) 99.0 ~ 100.5 Copper≤3 mg/kgIron≤2 mg/kgMercury≤1 mg/kg Arsenic≤2 mg/kg Lead≤2 mg/kgOxalic acid≤0.2%Loss on drying≤0.1%Sulphated ash≤ 0.1%Residual solvents (as methanol)≤ 500 mg/kg Total plate count (cfu/g)≤ 1000Yeasts & molds (cfu/g)≤ 100 Escherichia. Coli/g Absence Salmonella/ 25g Absence Staphylococcus aureus/ 25g Absence