Appearance: White crystals or crystalline powder | Specific Rotation[]D20: +46.5 to +49.0 | State of solution: Clear and colorless Not less than 96.0% | Chloride (Cl): Not more than 0.020% | Ammonium (NH4): Not more than 0.02% | Sulfate (SO4): Not more than 0.020% | Iron (Fe): Not more than 30ppm | Heavy Metals (Pb): Not more than 10ppm | Aresenic (As2O3): Not more than 2ppm | Loss on drying: Not more than 0.5% | Residue on ignition: Not more than 0.1% | Assay:99.0% to 101.0% | Tyrosine: Not more than 1.0% | pH: 2.0 to 3.0
