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CAS No. : 74-79-3
Molecular formular: C6H14N4O2
Molecular weight: 174.2
L-Arginine | AJI92 | USP40 | EP6.0 |
Description | White crystals or crystalline powder | / | White or almost white crystalline powder or colourless crystals |
Solubility | / | / | Freely soluble in water,very slightly soluble in alcohol. |
Identification | Conform | Conform | Conform |
Appearance of solution | / | / | Clarity of solution:5% water solution should be clear |
Colour of solution:5% water solution should be not more intensively coloured than reference solution BY6 | |||
Assay | 99.0%～101.0% | 98.5%～101.5% | 98.5%～101.0% |
pH | 10.5~12.0 | / | / |
Transmittance | ≥98.0% | / | / |
Loss on drying | ≤0.5% | ≤0.5% | ≤0.5% |
Residue on ignition | ≤0.10% | ≤0. 3% | ≤0. 1% |
Chloride | ≤0.020% | ≤0.05% | ≤200ppm |
Heavy Metals | ≤10ppm | ≤15ppm | ≤10ppm |
Iron | ≤10ppm | ≤30ppm | ≤10ppm |
Sulfate | ≤0.020% | ≤0.03% | ≤200ppm |
Endotoxin | / | / | / |
Arsenic | ≤1ppm | / | / |
Ammonium | ≤0.02% | / | ≤200ppm |
Other amino acids | Conforms | Conforms | / |
Pyrogen | Conforms | / | / |
Cinematographic purity | / | / | / |
Specific Rotation | +26.9° ～ +27.9° | +26.3°～+27.7° | +25.5°～ +28.5° |
Ninhydrin-positive substances (TLC) | / | / | Conform |
Manufacturing
