L-Cysteine
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- Category :
Organic chemicals and Derivatives/Aroma compounds
- CAS NO : 52-90-4
- EC NO : 200-158-2
- Molecular Formula : C3H7NO2S
- Main Specifications : 99% min
- Synonyms : Cysteine, L-;L-(+)-Cysteine;L-Alanine, 3-mercapto-;L-Cys;NSC 8746;L-Cysteine;(+)-2-Amino-3-mercaptopropionic acid;L-beta-mercaptoalanine;L-Cysteine Free Base Crystalline;(S)-(-)-Cysteine;L-Cysteine Base;H-Cys-OH;
Package: 25kg 50kg drum or bag
Uses : used as an antidote for hepatitis, liver poisoning, antimony poisoning, and radioactive drug poisoning
Molecular Structure:
Product description:
What is the chemical of L-Cysteine?
Appearance: Colorless to white fine columnar crystals or white crystalline powder, with a slight special odor (slightly sulfur-containing) and a slightly sour taste ;
Assay: 99% min by HPLC ;
IR Identity: conform to standard ;
HNMR： conform to standard ;
carbon spectrum: conform to standard ;
Water by K. F.:0.5% max or as per the customer’s request ;
Loss on drying:0.5% max. or as per the customer’s request ;
Melting point:218~220℃;
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purpose
L-cysteine has various uses, mainly including:
In the field of medicine: used as an antidote for hepatitis, liver poisoning, antimony poisoning, and radioactive drug poisoning; It is a raw material for drugs such as acetylcysteine; It has the functions of resolving phlegm, antioxidation, and preventing radiation damage.
Food industry: As a bread fermentation aid (promoting gluten formation, accelerating fermentation), nutritional supplement, antioxidant for fruit juice and milk powder, it prevents vitamin C oxidation and fruit juice browning.
Cosmetics industry: used in products such as hair perm lotion, sunscreen, beauty water, etc., to exert reducing, antioxidant, and hair care effects.
Biochemical research: Used for preparing tissue culture media, it is an important raw material for studying proteins and enzymes.
Feed additive: As a nutritional enhancer, it supplements the sulfur-containing amino acids needed by animals
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synthetic route
The industrial synthesis of L-cysteine mainly involves the following methods:
Hydrolysis method: Using animal hair or feathers as raw materials, hydrolysis is carried out by heating with hydrochloric acid, followed by decolorization, neutralization, recrystallization and other steps to obtain crude L-cysteine, which is then converted to L-cysteine through electrolytic reduction or chemical reduction.
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