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L-Cysteine |
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Chemical Name: (+)-2-Amino-3-mercaptopropionic acid
Molecular Formula: C3H7NO2S 
Molecular Weight: 121.15
Cas NO: [ 52-90-4 ]
Characteristics: White crystalline powder; tasteless, easily soluble in water but insoluble in alcohol and ether
Quality Standards: AJI92, FCC4 etc. |
Specification Sheet
(AJI92) |
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Expiry Period : 2 years
Packaging: 25kg / drum |
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Items |
Specifications |
Description |
White crystals or crystalline powder |
Identification |
Infrared absorption spectrum |
Assay, % |
98.0 ~ 101.0 |
Specific rotation,° |
+8.3 ~ +9.5 |
State of solution, % |
≥95.0 |
Chloride (Cl) , % |
≤0.04 |
Ammonium (NH4) , % |
≤0.02 |
Sulfate (SO4) , % |
≤0.030 |
Iron (Fe), ppm |
≤10 |
Heavy metals (Pb) , ppm |
≤10 |
Arsenic (As2O3) , ppm |
≤1 |
Loss on drying, % |
≤0.50 |
Residue on ignition (sulfated) , % |
≤0.10 |
PH |
4.5 ~ 5.5 |
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