L-Cystine
Cas No.：56-89-3/24645-67-8
Standard：AJI92/USP/FCC
Synonym: L(-)-3,3'-Dithiobis(2-aminopropanoic acid); 2-Amino-3-[(2-amino-2-carboxyethyl)dithio]propanoic acid
Molecular Formula: C6H12N2O4S2
Molecular Weight: 240.29
Molecular Structure: 
Specifications:
|
Item
|
Standard
|
|
Appearance
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White crystals or crystalline Powder
|
|
Specific rotation
|
-215~-225°
|
|
State of solution (Transmittance)
|
≥98.0%
|
|
Chloride(Cl)
|
≤0.020%
|
|
Ammonium(NH4)
|
≤0.020%
|
|
Sulfate(SO4)
|
≤0.020%
|
|
Iron(Fe)
|
≤20ppm
|
|
Heavy metals(Pb)
|
≤10ppm
|
|
Arsenic(As2O3)
|
≤1ppm
|
|
Other Amino Acids
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Chromatographically not detectable
|
|
Loss on drying
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≤0.20%
|
|
Residue on ignition(Sulfated)
|
≤0.10%
|
|
Assay
|
98.5~101.0%
|
|
PH
|
5.0~6.5
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Package:25kg drum