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Vitamin C (Coated 97%) Ascorbic Acid HS: 293690001
BiochemicalVitamin CAscorbic Acid
Tianjin Haitong Chemical Industrial Co., Ltd.
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Product Description Appearance: White or almost white granular passOdor: Odorless or almost odorlessIdentification: Positive ReactionHeavy Metals (lead) <10ppmArsenic <3ppmLoss on drying((1g, silica gel, 24h) 0.15% maxResidue on ignition 0.1% maxAssay (Calculated on the dried basis) 96.0- 98.0%Fineness: Through 20 Mesh &ge 98% b. Through 100 Mesh 25%Microbiology Max. 500aerobe/g Max. 100 fungus/gThe absence of E. ColiStorage: Kept in cool, dry and closed placeShelf-life: 2 years 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/kgArsenic≤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
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