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Ascorbic Acid Appearance: White or Almost White Crystalline Powder Specification:   Identification: Positive Reaction   Melting Point: About 190?   pH(With 2% Water Solution): 2.4~2.8   pH(With 5% Water Solution): 2.1~2.6   Clarity of Solution: Clear   Colour of Solution: BY7 max   Copper: 5ppm max   Heavy Metals: 10ppm max   Lead: 2ppm max   Iron: 2ppm max   Cadmium: 3ppm max   Arsenic: 3ppm max   Mercury: 0.1ppm max   Zinc: 25ppm   Oxalic Acid: 0.2% max   Sulphate Ash(Residue on Ignition): 0.1% max   Specific Optical Rotation: +20.5° ~ +21.5°   Assay: 99.0% ~ 100.5%   Loss on Drying: 0.4% max   Residual Solvents: Methanol:NMT 3000 ppm Usage: Widely used in many fields such as food , beverage, breeding and forage additives. Packing: 25kg per carton Shijiazhuang Yuanchem Imp.& Exp. Corp. Ltd. Telephone : +86-311-87796645 Mobile Phone : +86-13703398740 Fax : +86-311-87735088 E-mail : chengyuan@yuanchem.com URL : www.yuanchem.com         www.yuanchem.cn Street Address : Room 606, Zhongyuan Building, No. 368, Youyi North Street, Shijiazhuang, Hebei, China. Zip : 050071 Copyright(C)2010,Shijiazhuang Yuanchem Imp.& Exp. Corp. Ltd. All Rights Reserved.  Supported by ChemNet ChinaChemNet Toocle Copyright Notice