CAS 20532-33-6 appears in our catalog under these names: 5–Chlorobenzo(b)thiophene, 5-Chlorobenzo¼b|thiophene, 97% , 5-Chlorobenzothiophene 97%, 5-Chlorobenzothiophene, 97%, 97%, 5-Chloro-benzo[b]thiophene, 98%. Offered by: GLPBio, Thermo Scientific (Alfa Aesar), Ambeed, Chemat, Fluorochem. Available pack sizes: 100g, 25g, 5g, 250mg, 1g, 10g.