L-CYSTEINE manufacturer CAS:52-90-4

Synonyms：

H-CYS-OH

L-Cys

L-Cysteine;

CYSH

E 920

(R)-2-Amino-3-mercaptopropionic acid

FEMA 3263

CYS

Thioserine

CYSTEINE

Cystein

Molecular Formula: C3H7NO2S

Molecular weight：121.15800

Chemical & Physical Properties Density: 1.334 g/cm3
Boiling Point: 293.9ºC at 760 mmHg
Melting Point: 220 °C (dec.)(lit.)
Molecular Formula:C3H7NO2S
Molecular Weight: 121.15800
Flash Point:131.5ºC
Exact Mass: 121.019745
PSA: 102.12000
LogP: 0.23
Index of Refraction: 1.550


Application
Cysteine is one of the 20 natural amino acids and is a non-essential amino acid containing sulfur (same as methionine). It can be synthesized by methionine and serine in animals. It has the effect of alleviating and repairing radiation damage to the human body. It also has a wide range of detoxification effects in the human body, and is a therapeutic drug for acrylonitrile and aromatic acidosis. It helps to get rid of alcohol addiction and is needed for the function of the brain and liver; it is a necessity for the regeneration of liver cells.

Package and Storage
1 kg poly drum, 20 kg fiber boxStore in a cool, ventilated warehouse.
Store at RT..

Item	Limit	Result
Appearance	White crystals powder or crystalline powder	Conforms
Identification	Infrared absorption spectrum	Conforms
Specific rotation[a]D20°	+8.3°~+9.5°	+8.9°
State of solution	≥95.0%	98.80%
Ammonium(NH4)	≤0.02%	<0.02%
Chloride(Cl)	≤0. 1%	<0.05%
Sulfate(SO4)	≤0.030%	<0.020%
Iron(Fe)	≤10ppm	<10ppm
Heavy metals(Pb)	≤10ppm	<10ppm
Arsenic	≤1ppm	Conforms
Loss on drying	≤0.5%	0. 12%
Residue on ignition	≤0.1%	0.05%
Assay	98.0~101.0%	99.50%
PH	4.5~5.5	4.7