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Shijiazhuang Haitian Amino Acid Co.,Ltd.

21 YRS

Hebei, China

CNY 48 Million

36630 m²

Less than 50 people

Main Products: L-Proline / Glycine / L-Glutamic Acid / L-Cysteine / N-Acetyl-L-Cysteine / L-Citrulline

Hebei, China

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L-Cysteine / CAS 52-90-4

OVERVIEW

Uses

Packaging

25 KG/Fibre Drum

Lead Time

14-30 days

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DESCRIPTION

L-Cysteine

CAS No.: 52-90-4

Standard: AJI

Specification:

L-Cysteine	AJI92
Appearance	White crystals or crystalline powder
Identification	Conforms
Specific rotation	+8.3°~ +9.5°
State of solution	≥95.0%
Chloride(Cl)	≤0.04%
Ammonium(NH₄)	≤0.02%
Sulfate (SO₄)	≤0.030%
Iron(Fe)	≤10ppm
Heavy metals ( Pb)	≤10ppm
Arsenic(As₂O₃)	≤1ppm
Other amino acids	Conforms
Loss on drying	≤0.5%
Residue on ignition	≤0.1%
Assay	98.0%～101.0%
pH	4.5~5.5

Typical Properties

L-Cysteine is a kind of nonessential amino acid, which exists in keratin. Keratin is the main protein of nails, toenails, skin and hair. The relationship between L-cysteine and cystine is very close. Two molecules of L-cysteine form one molecule of cystine. L-Cysteine is more unstable. It is easy to become cystine which can also be reduced to L-cysteine. Both of them are sulfur-containing amino acids, which have effects on skin formation and detoxification. L-Cysteine is mainly used in cosmetics, medicine and food. In cosmetics, it is used to prepare perm, sunscreen, hair perfume and hair essence. In the field of medicine, it is used to prepare methyl cysteine, ethyl cysteine, acetylcysteine, methyl cysteine, ethyl cysteine and comprehensive amino acid preparations. L-Cysteine can also be used as a protective drug against radiation injury. In food, L-cysteine is used as bread fermentation auxiliary (ripening agent), antioxidant stabilizer for milk powder and fruit juice, and nutrient for pet animal food.

CAS No.

52-90-4

Formula

C3H7NO2S

Molecular Mass

121.158

Exact Mass

121.02

PSA

102.12000

Logp

0.02840

IUPAC

(2R)-2-amino-3-sulfanylpropanoic acid

SMILES

C([CH](C(=O)O)N)S

Matter Classification

organic

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