CAS 1923-70-2 appears in our catalog under these names: Tetra-n-butylammonium perchlorate, electrochemical grade , Tetra-n-butylammonium perchlorate, 99+% . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 10g, 50g, 250g, 25g, 100g, 2.5g.