CAS 257284-60-9 appears in our catalog under these names: Tetrakisepoxy cyclosiloxane, 95%, Tetrakisepoxy cyclosiloxane , Cyclosiloxanes, Me 3-(oxiranylmethoxy)propyl. Offered by: Combi-blocks, Thermo Scientific (Alfa Aesar), Chemat. Available pack sizes: 25g, 100g, 5g.