English name:2-methyl-3-hydroxy quinoline-4-carboxylic acid Cas no:117-57-7 Molecular formular:c11h9no3 Molecular weight:203.18 Appearance: yellow powdery substance Purity content:99%min Usage: widely used in pharmacy and other organic synthesis Molecular weight:203.18 Package: woven bag with nylon film inside lining, each pack is 25kg.