L-Cysteine

• Post Date:

  Jun 20,2016

• Expiry Date:

  Jun 20,2017

• Detailed Description:

  Cas No. :52-90-4 Quantity: 5000Metric Tons
  Specs:98%
  Payment Method: T/T L/C
  Appearance: Our L-Cysteine is colorless or white crystalline substance of hexagon, or
  
  crystalline powder.
  
  
  
  Statutory No: CAS 52-90-4
  
  
  
  Molecular formula: C6H12N2O4S2
  
  
  
  Molecular weight: 240.3
  
  
  
  Product specification:
  
  Item
  
  
  Specifications (AJI97 )
  
  Appearance
  
  
  White crystal or crystalline powder; tasteless
  
  Assay, %
  
  
  98.5~101.0
  
  Specific rotation
  
  
  -218°~ -224°
  
  Loss on drying, %
  
  
  ≤0.2
  
  Transmittance, %
  
  
  ≥98.0
  
  Chloride (as Cl), %
  
  
  ≤0.02
  
  Sulfate (as SO4), %
  
  
  ≤0.02
  
  Ammonium as (as NH4), %
  
  
  ≤0.02
  
  Iron (as Fe), %
  
  
  ≤0.001
  
  Heavy Metals (as Pb), %
  
  
  ≤0.001
  
  Arsenic (as As), %
  
  
  ≤0.0001
  
  pH Value
  
  
  5.0~6.5
  
  Residue on ignition, %
  
  
  ≤0.1
  
  
  
  Packaging: 25kg/paper plastic complex bag,or according to order.
  
  
  
  Storage: Preserve in well-closed,container,store in cool, dry place.
  
  
  Shelf life: in conform to the specified storage conditions and packaging is complete, shelf life
  
  is 2 years.
  
  Usage: (1) L-Cysteine is one of the important products the amino acid series. It is widely used
  
  in medical, chemical and food industry.
  
  (2) It is a good drug for prevention of skin old and feeble, cirrhosis and other liver diseases.

• CAS Registry Number:

  52-90-4

• 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;

• Molecular Formula:

  C₃H₇NO₂S

• Molecular Weight:

  121.15

• Molecular Structure:

  

• Hazard Symbols:

   Xn:Harmful;
  

• Risk Codes:

  R22:;
  R36/37/38:;
  

• Safety Description:

  S26:;
  S37/39:;
  

• Company:

  Hebei Zhousheng Biological Technology CO., LTD         

• Contact:

  elaine

• Tel:

  0311-86556681

• Fax:

  0311-86556687

• Email:

  elaine@zsbiological.com