L- cysteine

• Post Date:

  Jun 11,2015

• Expiry Date:

  Jun 10,2016

• Detailed Description:

  Cas No. :67-48-1 Quantity: 1Metric Tons
  Specs:1kg/ foil bag with discreet packgae
  Price:1 USD Kilograms
  Payment Method: T/T, WesterN Union, Money Gram
  L- cysteine
  
  English Name: L-Cysteine
  
  English synonyms: CYS; CYSH; E 920; L-Cys; Cystein; NSC-8746; CYSTEINE; H-CYS-OH; FEMA 3263; Thioserine
  
  Chinese Name: L- cysteine
  
  Chinese synonyms: cysteine; cysteine; L- cysteine cysteine L- Feng; L-; cystine; L- cysteamine acid; L- half bladder amino acid; a sulfhydryl amino propane hydrochloride; L- sulfur hydrogenated amino acid; L- beta DL alanine
  
  CAS number: 52-90-4
  
  Molecular formula: C3H7NO2S
  
  Molecular weight: 121.16
  
  Chemical properties
  
  Colorless to white fine columnar crystal or white crystalline powder, slightly special smell and taste (slightly acid). Reducibility, anti oxygen and prevent non enzymatic browning effect. The melting point of 175 DEG C (decomposition). Soluble in water, an acidic aqueous solution, pH value at 3% to 1.2, 1% to 1.7, 0.1% to 2.4. Also soluble in ethanol, ammonia and acetic acid, insoluble in ether, acetone, benzene, carbon disulfide and chloroform.
  
  One amino acid, but is a non essential amino acid.
  
  Content: 99%
  
  Packing: 25kg/ bucket
  
  Quality standard: AJI92/USP28/EP5/FCCIV
  
  Use: (1) the series of products are widely used in medicine, food and cosmetic industry (2) for biochemical research, used medicinally to hepatitis, liver toxic, radioactive drug poisoning, poisoning antidote antimonials. The treatment of eczema, urticaria, freckles and other skin diseases (3) for bread material, in order to promote the gluten formation and promote fermentation, mould, prevent aging, etc.. For the natural fruit juices, to prevent vitamin C oxidation and prevent the juice brown. This product has the role of detoxification, can be used for acrylonitrile poisoning, aromatic acid poisoning. The products and prevention of radiation damage the human body, is also the drug treatment of bronchitis, especially as expectorants (mostly with acetyl L- cysteine methyl ester acid salt form use. Mainly used for cosmetics beauty water, perm liquid, solarization skin care cream etc..
  
  Production method: 1 grains of tin reduction will cystine soluble in dilute hydrochloric acid, filtered, the filtrate add tin particle heating reflux 2h. The reducing solution diluted with water to remove residual tin particles, H2S saturate, filter, filter residue with a small amount of water washing, the washing, the filtrate, vacuum concentrating, cooling crystallization, filtration, drying to obtain L- cysteine hydrochloride. To L- cysteine hydrochloride as raw material, alkali neutralization refined 2 electrolysis reduction will be distilled water, hydrochloric acid, cystine joined the electrolytic bath stirring and dissolving, maintained at 50 Deg. C electrolysis to the end. The resulting hydrogen sulfide electrolyte through several hours, filtering. The filtrate is added with active carbon decolorization, filtering and concentrating, cooling crystallization, filtration, drying, L- cysteine hydrochloride.
  
  Melting point: 220 degree C (Dec.) (lit.)
  
  Specific rotation: 8.75 o (c=12 2N HCl)
  
  Refractive index: 8.8 degrees (C=8 1mol/L HCl)
  
  Storage conditions: Store at RT.
  
  Solubility: H2O: 25 mg/mL
  
  Water solubility: 280 g/L (25 oC)
  
  Food grade (also can be used in medicine) AJI-92 USP30
  
  The content of 99%
  
  125.5/kg

• CAS Registry Number:

  67-48-1

• Synonyms:

  ;2-Hydroxyethyl trimethylammonium chloride;Choline chloride, FCC Grade;2-hydroxy-N,N,N-trimethylethanaminium chloride;2-hydroxy-N,N,N-trimethylethanaminium chloride hydrochloride;

• Molecular Formula:

  C₅H₁₄ClNO

• Molecular Weight:

  139.625

• Molecular Structure:

  

• Hazard Symbols:

   Xi:Irritant;
  

• Risk Codes:

  R36/37/38:;
  

• Safety Description:

  S26:;
  S36:;
  

• Company:

  Zhuhai Shuangbojie Technology Co., Ltd     [ China ]        

• Contact:

  jeffyding

• Tel:

  +86-0765-8889897

• Fax:

  +86-0765-8889806

• Email:

  jeffyding@ycphar.com