L-Cysteine Base CAS 52-90-4

L-Cysteine Base CAS 52-90-4

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Product Details

 

Product name:
L-Cysteine Base
Molecular Formula: 
C3H7NO2S
Molecular Structure:
mtxx356
Molecular Weight:
121.158
CAS No.:
52-90-4


Description  

L-Cysteine is white crystal or crystalline powder. It is soluble in water, ethanol, acetic acid and ammonia, insoluble in ether, acetone, ethyl acetate, benzene, carbon disulfide and carbon tetrachloride. It can be oxidized to cystine by air in neutral and weakly alkaline solutions.

 

Application

In the food industry, it can be used as a nutritional supplement, as well as a raw material for flavors and fragrances. In the daily chemical industry, it can also be used as a raw material for whitening cosmetics and hair dye preparations with no toxic side effects.

 

Specification

Appearance
White crystal or crystalline powder
Identification 
In accordance with standard retention time
Specific rotation
+8.3°~ +9.5°
Transmittance 
Not less than 95.0%
Ammonium 
Not more than 0.02%
Sulfate
Not more than 0.03%
Heavy Metal
Not more than 10ppm
Iron
Not more than 10ppm
Arsenic
Not more than 1ppm
Other amino acids
Not detected
Loss on drying
Not more than 0.5%
Residue on ignition
Not more than 0.2%
Assay
98.0~102.0%
PH
4.5~5.5


Packing

25kg/drum or as customer’s requirements.

 

Storage

Preserve in well-closed containers. Stored in cool, dry and ventilated warehouse, and keep away from moisture.

 

Minimum Order

100kgs

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