CAS 876403 appears in our catalog under these names: 2-Butyl-1,2-benzisothiazolin-3-one/ 98.34% (existing batch purity), 2-Butylbenzo[d]isothiazol-3(2H)-one, 96%, Topiramate Impurity 6, Topiramate EP Impurity B, Topiramate Impurity 2 (Topiramate EP Impurity B). Offered by: TargetMol, Fluorochem, Chemat Brand, Hubei YoungXin, TRC. Available pack sizes: 1mg, 5mg, 10mg, 25mg, 50mg, 100mg, 500mg, 1g.