CAS NO:22204-24-6 Pyrantel pamoate Name Pyrantel pamoate Synonyms 1-Methyl-2-(2-[2-thienyl]ethenyl)-1,4,5,6-tetrahydropyrimidine compound with 4,4'-methylenebis(3-hydroxy-2-naphthoic acid) Molecular Formula C23H16O6.C11H14N2S;C34H30N2O6S Molecular Weight 594.68 CAS Registry Number 22204-24-6 EINECS 244-837-1 Melting point 266-267 oC Water solubility <0.1 g/100 mL at 19 oC Apperance: Yellow or Brownish yellow solid Loss on drying: not more than 2.0% Residue on ignition: not more than 0.5% Heavy metal: not more than 0.005% Ethanol: not more than 4000ppm Assay: 97.0-103.0% Quality standard: CP2010/USP30 Packing: 20kg/drum