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L-Cystine
CERTIFICATE OF ANALYSIS
  L-Cystine   DATE:Oct.27,2000
Item
Specification
  RESULT  RESULT  RESULT  RESULT  RESULT  
Batch No.   001001 001002 001003 001004 001005  
Quantity   1000KGS 1000KGS 1000KGS 1000KGS 1000KGS  
Description of Goods White Crystalline powder White Crystalline Powder White Crystalline Powder White Crystalline Powder White Crystalline Powder White Crystalline Powder  
Specific Rotation(a)20D  -215~225° -219.10° -219.25° -220.92° -219.40° -220.46°  
State of solution ( Transmittance) ≥98.0 98.3 98.3 98.6 98.5 98.7  
Iron (Fe) ≤20ppm 1ppm 1ppm 1ppm 1ppm 1ppm  
Heavy metals(Pb) ≤10ppm 9ppm 10ppm 9ppm 8ppm 9ppm  
Chloride (Cl) ≤0.02% 0.02% 0.02% 0.02% 0.02% 0.019%  
Loss on drying ≤0.20% 0.02% 0.03% 0.02% 0.02% 0.03%  
Residue of Ignition ≤0.10% 0.02% 0.03% 0.02% 0.02% 0.04%  
Other Amino Acid   Conforms Conforms Conforms Conforms Conforms  
Sulfate(SO42-) ≤0.02% 0.019% 0.019% 0.020% 0.020% 0.019%  
Ammonium (NH4) ≤0.02% 0.015% 0.015% 0.015% 0.015% 0.016%  
Arsenic (AS2O3) <1ppm <1ppm <1ppm <1ppm <1ppm <1ppm  
Assay 98.50~101.0% 99.48% 99.68% 99.85% 99.76% 99.69%  
Solubility (in water) >20% >20% >20% >20% >20% >20%  
Tested date:   Oct.16, 2000 Oct. 16,2000 Oct. 16,2000 Oct. 16,2000 Oct. 16,2000  
Conclusion AJI88 Conformed to AJI 88 Conformed to AJI 88 Conformed to AJI 88 Conformed to AJI 88 Conformed to AJI 88  
Director of quality control ZCM ZCM ZCM ZCM ZCM ZCM  

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