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L-Cystine CAS:56-89-3<< 返回
ItemLimit
AppearanceWhite crystal or crystal powder
Specific Rotation [a]D20o-215° to -225°
State of Solution 98.0% Min
Chloride (Cl)0.02% Max
Ammonium (NH4)0.02% Max
Sulfate (SO4)0.02% Max
Iron (Fe)10ppm Max
Heavy Metals (Pb)10ppm Max
Arsenic (As2O3)1ppm Max
Loss on Drying0.2% Max
Residue in Ignition0.1% Max
PH5.0 to 6.5
Assay98.5% to 101.0%
IdentificationInfrared absorption spectrum
Other Amino AcidsConforms
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