优质维生素C

JIZHOU CITY HUAYANG CHEMICAL CO., LTD. Add:NO.645 FuYang East Road, Jizhou City, Hebeiprovince, China Phone: +86-318-8638826 Fax:+86-318-8638826 CERTIFICATE OF ANALYSIS Product Name: Ascorbic acid Quantity: 1000kg Batch No: 1009100501 Producing date: 2010.05.20 Sampling date: 2010.05.20 Shelf life: two years Reference standard: BP2007/USP30 Item Specifications Results characteristics A white or almost white crystalline powder or colourless crystals Pass Identification Positive reaction Positive reaction Melting point About 190℃ 190.0℃ PH value 2.1-2.8 2.2 Clarity of solution Clear Clear Colour of solution BY7 max pass Copper 5ppm max 2ppm Heavy metals 10ppm max pass Iron 2ppm max 1ppm Oxalic acid 0.2%max 0.2%max Sulphate ash(residue on ignition) 0.1%max 0.03% Specific optical rotation +20.5°~+21.5° 21.0° Assay 99.0%-100.5% 99.9% Conclusion: This product conforms to BP2007/USP30 standard. Operator: Jia Jingtan Checker: Liu Qingshuang