L-Cysteine

Products

CAS No.: 52-90-4
Molecule Formula: C3H7NO2S
Molecule Weight: 121.16
Structure Formula:

Description:white crystal or white powdery .
Manufacture Standards:USP, AJI
Specification:

Test items	Specification (AJI)	Specification (USP25)
Appearance	white crystal or 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	---
Organic volatile matter And organic impurities	---	---

Packaging and storage: 25kg/drum, lined with double-layer film bag; Stored in a sealed container, and kept at room temperature.