L-蛋氨酸

Appearance White crystals or crystalline powder Assay 98.5%min Identification Meet the requirements Specific rotation [α]D25 +22.4°~+24.7° Chloride(Cl) 0.05% max Sulfate(SO4) 0.03% max Iron(Fe) 0.003% max Heay metals(Pb) 0.0015% max Loss on drying 0.30% max Residue on ignition 0.40%max Chromatographic purity Not more than 0.5% of any individual impurity is found； Not more than 2.0% of total impurities is found Organic volatile impurities Meets the requirements pH 5.6~6.1