CAS 51765-51-6 appears in our catalog under these names: Nimesulide EP Impurity B, 2'-Phenoxymethanesulfonanilide, >95% (HPLC), N-(2-Phenoxyphenyl)methanesulphonamide, N–(2–Phenoxyphenyl)methanesulfonamide, 2-((Phenoxymethyl)sulfonyl)aniline. Offered by: Chemat Brand, TRC, Mikromol, GLPBio, Biosynth. Available pack sizes: on request, 100mg, 1g, 25g, 25mg, 5g, 100g, 500g.