CAS 5271-67-0 appears in our catalog under these names: 2-Thiophenecarbonyl Chloride, 2–Thenoyl Chloride, Thiophene-2-carbonyl chloride, 98% , 2-Thenoyl Chloride, >99.0%(T), 2-Thiophenecarbonyl chloride, 98%. Offered by: TRC, GLPBio, Thermo Scientific (Alfa Aesar), TCI, Thermo Scientific (Acros). Available pack sizes: 100g, 25g, 50g, 500g, 5g, 25ML, 100ML.