CAS 13771-75-0 appears in our catalog under these names: 5-Chloro-1-benzothiophene-2-carboxylic acid, 98%, 5-Chlorobenzo(b)thiophene-2-carboxylic acid, 98%, 5-Chlorobenzo[b]thiophene-2-carboxylic acid, 98%, 5-Chloro-1-benzothiophene-2-carboxylic acid, 95%+. Offered by: Combi-blocks, AmBeed, Chemat, BLDpharm, Fluorochem. Available pack sizes: 250mg, 5g, 10g, 1g, 100mg, 50mg.