CAS 10312-42-2 appears in our catalog under these names: 1,2-Benzisothiazole-2(3H)-butanoic acid, 3-oxo-, 1,1-dioxide, 95%, 4-(1,1-Dioxido-3-oxobenzo(d)isothiazol-2(3H)-yl)butanoic acid, 95+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 5g, 10g.