CAS NO:59-51-8 DL-Methionine Chinese name English name DL-Methionine DL- methionine CAS No. 59-51-8 The molecular formula C5H11NO2S with molecular weight of 149.21 The AJI92/USP30/CP2010 quality standard Appearance: white or white crystalline powder The solubility of MORE THAN 98% chlorine content NMT 0.020% Ammonium sulfate NMT 0.020% NMT 0.02% Iron NMT 10PPm NMT 10PPm NMT 1PPm heavy metal arsenic salt Dry weight loss NMT 0.30% residue on ignition NMT 0.10% The contents of 99