Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 66104-23-2, Whether you call it Pergolide Mesylate, 8&#223 or -[(Methylthio)methyl]-6-propylergoline Monomethanesulfonate you can be assured the Pergolide Mesylate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.