Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 26921-17-5, Whether you call it Timolol Maleate or (S)-1-tert-Butylamino-3-(4-morpholino-1 -2 -5-thiadiazol-3-yloxy)propan-2-ol Maleate you can be assured the products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.