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DL-Serine CAS:302-84-1<< 返回
ItemLimit
AppearanceWhite or almost white crystalline powder or colourless crystals
Specific Rotation [a]D20o +0.5 to –0.5 degree
Chloride (Cl)NMT 500 ppm
Sulfate (SO4)NMT 300 ppm
Iron (Fe)NMT 30 ppm
Heavy Metals (Pb) NMT 15 ppm
Loss on DryingNMT 0.2 %
Residue in Ignition NMT 0.1 %
Total viable aerobic countNMT 1000 CFU/g
Moulds and Yeasts NMT 100 CFU/g
Escherichia coli in 1 g not detectable
Assay98.5 to 101.5 %
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