4-METHYLTHIO-2-BUTANONE PRODUCT NAME 4-METHYLTHIO-2-BUTANONE SYNONYM 4-(METHYLMERCAPTO)-2-BUTANONE CODE 3205 CAS Nº 34047-39-7 FEMA Nº 3375 EINECS 251-810-8 FORMULA C5 H10 O S MOLECULAR WEIGHT 118,20