L-Cysteine CAS:52-90-4

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1 Kilogram	FOB Price: USD 1.0000

1 Kilogram

FOB Price: USD 1.0000

L-Cysteine Cysteine, L- CAS:52-90-4

Product Name: L-Cysteine

CAS Number: 52-90-4

Molecular Formula: C3H7NO2S

Molecular Weight: 121.16

EINECS Number: 200-158-2

Appearance：White powder

Purity：99%

Items	Specification
Appearance	white powdery
Identification	tested by Infrared absorption spectrometer
Specific rotation	+8.3°- +9.5°
Solubility	≥ 95.0%
Chlorine content	≤ 0.04%
Ammonium salt (NH4 )	≤ 0.02%
Sulfate radical (SO4 )	≤ 0.030%
Ferric salt (Fe)	≤ 10PPm
Heavy metal (Pb)	≤ 10PPm
Arsenic salt (As2O3)	≤ 1PPm
Other amino acids	conforms
Loss on drying	≤ 0.5%
Residue on Ignition (sulfated)	≤ 0.1%
Assay	98.0-101.0%
pH	4.5-5.5