L-Cysteine Hcl

Molecular Formula: C3H7NO2S.HCl.H2O Molecular Weight: 175.64 CAS No： 7048-04-6

L-Cysteine Hcl Monohydrate	CP2020	EP11	USP2023	AJI92	L-Cysteine Hcl Anhydrous AJI92
Assay	≥98.5%	98.5-101.0%	98.5-101.5%	99.0-100.5%	98.0-102.0%
PH	1.5-2.0	/	/	1.5-2.0	1.5-2.0
Specific rotation[a]D20	+5.5°-+7.0°	+5.5°-+7.0°	/	+5.5°-+7.0°	+5.6°-+8.9°
Specific rotation[a]D25	/	/	+5.7°-+6.8°	/	/
Transmittance(T430)	≥98.0%	/	/	≥98.0%	≥98.0%
Appearance of solution	/	clear & colorless ≤BY6	/	/	/
Chloride(Cl)	19.8-20.8%	/	/	19.89-20.29%	/
Ammonium(NH4)	/	≤0.02%	/	≤0.02%	/
Sulfate(SO4)	≤0.02%	≤0.03%	≤0.03%	≤0.02%	/
Iron(Fe)	≤10PPM	≤20PPM	≤30PPM	≤10PPM	/
Heavy metals(Pb)	≤10PPM	/	/	≤10PPM	≤10PPM
Arsenic	≤1PPM	/	/	≤1PPM	≤1PPM
Other amino acids	≤0.5%	/	Individual impurities≤0.5% Total impurities≤2.0%	Chromatographically not detectable.	Chromatographically not detectable.
Ninhydrin-positive substances	/	Each impurity≤ 0.2% Total impurity≤ 1.0%	/	/	/
Loss on drying	8.0-12.0%	8.0-12.0%	8.0-12.0%	8.5-12.0%	≤1.0%
Residue on ignition	≤0.10%	≤0.10%	≤0.4%	≤0.10%	≤0.1%
Endotoxin	conform	conform	conform	/	/
Total plate count	≤ 1000 CFU/g	≤ 1000 CFU/g	≤ 1000 CFU/g	≤ 1000 CFU/g	≤ 1000 CFU/g
Moulds & Yeasts	≤ 100 CFU/g	≤ 100 CFU/g	≤ 100 CFU/g	≤ 100 CFU/g	≤ 100 CFU/g

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