DL-丝氨酸

产品名称 DL-丝氨酸 Product Name DL-Serine CAS # 5619-04-5 Iron (Fe) NMT 30 ppm Total viable aerobic count NMT 1000 CFU/g Moulds and Yeasts NMT 100 CFU/g Appearance White or almost white crystalline powder or colourless crystals Specific Rotation [a]D20o +0.5 to –0.5 degree Chloride (Cl) NMT 500 ppm Heavy Metals (Pb) NMT 15 ppm Sulfate (SO4) NMT 300 ppm Assay 98.5 to 101.5 % Escherichia coli in 1 g not detectable Residue in Ignition NMT 0.1 % Loss on Drying NMT 0.2 %