L-Cysteine CAS 52-90-4 (+) -2-Amino-3-Mercaptopropionic Acid Cysh

• Type: Cysteine
• Chemical Character: Alkalinity
• Appearance: Powder
• Molecular Weight: 121.15
• Melting Point: 220 ºC
• Shelf Life: 2 Years
• Model NO.: SUREST-158
• Stock: Available
• Fema: 3263
• Alpha: 8.75 º (C=12, 2n HCl)
• Water Solubility: 280 G/L (25 ºC)
• Transport Package: 1kg/Bag or 25kg/Drum
• Specification: 98%min
• Trademark: Surest
• Origin: China
• HS Code: 2930909099
• Production Capacity: 1000 Tons Yearly

Product Description

L-Cysteine

Name	L-Cysteine
Synonyms	(+)-2-Amino-3-mercaptopropionic acid; L-beta-Mercaptoalanine; CySH
Molecular Structure
Molecular Formula	C3H7NO2S
Molecular Weight	121.15
CAS Registry Number	52-90-4
EINECS	200-158-2
FEMA	3263

Properties

Melting point	220 ºC
alpha	8.75 º (c=12, 2N HCl)
Water solubility	280 g/L (25 ºC)

Chemical Property:
It is white crystalline or crystalline powder, soluble in water, slightly smelly. Melting point 240ºC, monoclinic crystal system. Cysteine is one of the sulfur-containing amino acids, a non-essential amino acid, in vivo, by methionine sulfur atom and serine hydroxyl oxygen atom substitution, synthesis via cysteine sulfide, from cysteine to produce glutathione. Cysteine is stable to acids and easily oxidized to cysteine in neutral and alkaline solutions.

Main Uses:

1. In cosmetics: used for the production of perm, sunscreen, perfume, hair tonic, etc. This kind of advanced perm, cold ironing essence with cysteine instead of thio acetic acid, has the advantages of easy perm, easy to maintain hair style, soft and not messy, and can also prepare sunscreen and hair growth perfume;

2. In medicine: L-Cysteine is mainly used in liver drugs, antidotes, expectorants and other medicines. L-Cysteine and its derivatives can be used for liver poisoning detoxification, antipyretic analgesia, ulcer treatment, fatigue recovery, transfusion and comprehensive amino acid preparations, especially for expectorant. Treatment of bronchitis and phlegm.

3. In food: bread fermentation promoter, preservative. L-Cysteine is used as fermentation aid, antioxidant and stabilizer for milk powder and juice, and nutritional additive for pet animal food, etc.

4. L-Cysteine can be used as raw material for the production of n-acetyl-L -, carboxymethyl cysteine and other cysteine series derivatives.

5. Accelerate the formation of gluten and prevent aging; Used in natural juice to prevent the oxidation and Browning of VC; It can detoxify acrylic and aromatic acidosis. Prevention of radiation damage.

 

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