Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 23031-32-5, Whether you call it Terbutaline Sulfate or 2-tert-Butylamino-1-(3 -5-dihydroxyphenyl)ethanol Sulfate you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.