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L-Cysteine HCl Monohydrate

L-Cysteine HCl Monohydrate

L-Cysteine HCl Monohydrate Item Specification Appearance White crystals or crystalline powder Specific Rotation[α]D20 +5.5° to +7.0° State of solution Clear and colorless Not less than 98.0% Chloride (Cl) 19.89% to 20.29% Ammonium (NH4) Not more than 0.02% Sulfate (SO4) Not more than 0.020% Iron (Fe) Not more than 10ppm Heavy Metals (Pb) Not more than 10ppm Aresenic (As2O3) Not more than 1ppm Other amino aicds Chromatographically not detectable Loss on drying 8.5% to 12.0% Residue on ignition Not more than 0.10% Assay 99.0% to 100.5% pH 1.5 to 2.0

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