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Detail Information

Product Name: L(+)-Cysteine Appearance: White Crystalline Powder
CAS No.: 52-90-4 EINECS No.: 200-158-2
Specification: 98% Molecular Formula: C3H7NO2S
Molecular Weight: 121.15800 Shelf Life: 2 Years
Test Method: HPLC Storage: Cool Dry Place
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Le Nutra Amino Acid Supplements


Thioserine Acetyl L Cysteine


Le Nutra Acetyl L Cysteine

Product Description



Le-Nutra L-Cysteine cysteine l-cys Cys Cystein Thioserine powder Amino Acid Supplements



Base information of Product



Product Name L(+)-Cysteine
Appearance White crystalline powder
Cas No. 52-90-4
Active ingredients 98%
Shelf Life 2 years



Introduction of Product


L-cysteine is an amino acid commonly found in living organisms. It is one of the α-amino acids containing sulfur (defined as amino acids do not contain sulfur in high school chemistry optional 5). Nitroprusside is purple (because of SH), exists in many proteins, glutathione, and Ag+, Hg+, Cu+ metal ions can form insoluble mercaptide. That is, R-S-M ', R-S-M "-S-R (M ', M" are 1-valent and 2-valent metals respectively). Molecular formula C3H7NO2S, molecular weight 121.16. Colorless crystal. 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.



Function and Application of Product


L-Cysteine be used in medicine, cosmetics, biochemical research and other aspects. Used in bread to promote the formation of gluten and fermentation, mold, prevent aging, etc. Used in natural fruit juices to prevent vitamin C oxidation and to prevent fruit juices from Browning. This product has detoxification effect, can be used for acrylonitrile poisoning, aromatic acidosis. It also has the effect of preventing radiation damage to the human body, and is also used in the treatment of bronchitis, especially as a phlegm (mostly in the form of acetyl L-cysteine methyl ester). Cosmetics are mainly used in beauty lotion, perm fluid, anti-sun cream and so on.

Le Nutra Amino Acid Supplements Thioserine Acetyl L Cysteine 0


The synthetic methods


1. The cystine was dissolved in dilute hydrochloric acid by tin reduction method, then filtered. The filtrate was added to tin particles and reflux for 2h. The reducing solution was diluted with water, the remaining tin particles were removed, and hydrogen sulfide was added to saturate it. The filter residue was washed with a small amount of water. The washing and filtrate were combined, concentrated under pressure, cooled and crystallized, and then filtered and dried to obtain L-cysteine hydrochloride.


2. Electrolytic reduction method: add distilled water, hydrochloric acid and cystine into the electrolytic cell, stir to dissolve, and maintain electrolysis at below 50℃ to the end point. The resulting electrolyte was subjected to hydrogen sulfide for several hours and then filtered. The filtrate was decolorized with activated carbon, concentrated under pressure after filtration, crystallized after cooling, filtered and dried to obtain L-cysteine hydrochloride.


3. Synthesis: It can be hydrolyzed with hydrochloric acid by protein (such as human hair), then treated with copper oxide and decomposed with hydrogen sulfide. It can also be obtained by degradation of cystine.




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