CAS 593-04-4 appears in our catalog under these names: Boron trifluoride dibutyl etherate, 30-35%, (BF3), AcroSeal®, Boron Trifluoride - Butyl Ether Complex (BF3 ca. 30%), BORON TRIFLUORIDE DIBUTYL ETHERATE. Offered by: Thermo Scientific (Acros), TCI, Sigma-Aldrich. Available pack sizes: 100ML, 25ml, 500ml.