CAS 693-04-9 appears in our catalog under these names: Butylmagnesium Chloride (23% in Tetrahydrofuran, ca. 2mol/L), BUTYLMAGNESIUM CHLORIDE, 2.0M SOLUTION I, BUTYLMAGNESIUM CHLORIDE, 2.0M SOLUTION &. Offered by: TCI, Sigma-Aldrich. Available pack sizes: 250g, 100ML, 800ML.