CAS 23967-57-9: 4-chloro-1-benzothiophene-2-carboxylic acid

4-Chlorobenzo[b]thiophene-2-carboxylic acid

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

4-Chloro-1-benzothiophene-2-carboxylic acid is an industrial chemical that is used as a starting material for the production of a variety of organic compounds. It can be synthesized from xylene and potassium hydroxide in a reaction process. The first step of this process involves the treatment of xylene with potassium hydroxide to produce 4-chloro-3,5-dinitrobenzoic acid. This product is then mixed with hydrochloric acid to produce 4-chloro-1,2,4,5,6 benzenetetracarboxylic acid. Finally, 4-chloro-1 benzothiophene 2 carboxylic acid is produced by treatment with sodium sulfide followed by hydrolysis with sodium hydroxide solution. The intermediate compounds in this process are flammable and should be handled carefully.