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Position: Home -> Products -> L Group Amino Acids L-Cystine CAS:56-89-3 << BACK Item Limit Appearance White crystal or crystal powder Specific Rotation [a]D20o -215¡ã to -225¡ã 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 Drying 0.2% Max Residue in Ignition 0.1% Max PH 5.0 to 6.5 Assay 98.5% to 101.0% Identification Infrared absorption spectrum Other Amino Acids Conforms

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