L-Cysteine base

• Post Date:

  Nov 24,2016

• Expiry Date:

  May 23,2017

• Detailed Description:

  Cas No. :52-90-4 L-Cysteine base
  
  
  Cas No.:52-90-4
  
  Quality Standard: AJI97
  
  Description: white crystals or crystalline powder.
  
  Solubility (H2O, g/100g): about 16(20°)
  
  Specific rotation: +8.3 to +9.5°
  
  State of solution(transmittance): Not less than 95.0%
  
  Chloride: Not more than 0.04%
  
  Ammonium: Not more than 0.02%
  
  Sulfate: Not more than 0.030%
  
  Iron: Not more than 10ppm
  
  Heavy metals(Pb): Not more than 10ppm
  
  Arsenic: Not more than 1ppm
  
  Other Amino Acids: conforms
  
  Loss on drying: Not more than 0.5%
  
  Residue on ignition(sulfated): Not more than 0.10%
  
  Assay: 98.0 to 101.0%
  
  PH: 4.5 to 5.5
  
  Storage: Preserve in tight containers at controlled room temperature.
  
  Recommended limit: 1 year
  
  
  EXW Price: USD18/KG
  
  ivy8888@chembj.com
  

• 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:

  Wuhan Yuancheng Gongchuang Tech. Co.,Ltd.     [ China ]        

• Contact:

  qiuqiu

• Tel:

  8602788217838

• Fax:

• Email:

  ivy8888@chembj.com