CAS 252561-33-4 appears in our catalog under these names: 2–Fluoro–4–nitrophenyl methyl sulphone, 2-Fluoro-4-nitrophenyl methyl sulphone, 2-Fluoro-1-(methylsulfonyl)-4-nitrobenzene, 97%, 2-Fluoro-1-(methylsulfonyl)-4-nitrobenzene 97%, 2-Fluoro-1-(methylsulfonyl)-4-nitrobenzene, 96%. Offered by: GLPBio, Biosynth, Combi-blocks, Ambeed, Fluorochem. Available pack sizes: 100mg, 1g, 250mg, 5g, 25g.