Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 22204-24-6, Whether you call it Pyrantel Pamoate, 1 -4 -5 -6-Tetrahydro-1-methyl-2-[(E)-2-(2-thienyl)vinyl]pyrimidine 4 -4-methylenebis(3-hydroxy-2-naphthoate) or Pyrantel Embonate you can be assured the Pyrantel Pamoate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.