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L-Cysteine
Related Product Searches:L-Cysteine,High Quality,amino acid, L-Amino Acid
L- Cysteine
[CAS No.]:52-90-4
[Structural Formula]:C6H10N2Na2O4S2
[Molecular weight]:284.26
[Description]:White crystals or crystalline powder, Having a strong acid taste, could be dissolved in water.
[Packing]:25KG/ Paper drum
CERTIFICATE OF ANALYSIS
Product: L- Cysteine CAS NO.:56-89-3 Lot NO.: 100305 Date: March 10, 2010 | ||
Item | Specification(AJI92) | Result |
Specific rotation[a]D20 | -21.3 to -225° | +23° |
State of solution ( Transmittance) | Clear and colorless Not less than 98.0% | 99.0% |
Chloride(Cl) | ≤ 0.04% | ≤ 0.04% |
Ammonium(NH4) | ≤ 0.02% | ≤ 0.02% |
Sulfate (SO4) | ≤ 0.030% | ≤ 0.020% |
Iron(Fe) | ≤ 20ppm | ≤ 5ppm |
Heavy metals(Pb) | ≤ 10ppm | ≤ 5ppm |
Arsenic(as As2o3) | ≤ 1ppm | ≤ 1ppm |
other amino acids | Chromatographically Not detectable | Conforms |
Loss on drying | ≤ 0.5% | 0.2% |
Residue on ignition(sulfated) | ≤ 0.50% | 0.04% |
Assay | 98.5% to 101.0% | 99.9% |
PH | 2.0 to 2.8 | 2.3 |
Melting point | 106 to 110°C | 106 to 110°C |
Remarks: Agree with the specification of AJI92
L-Cysteine