CAS 78-10-4 appears in our catalog under these names: Tetraethoxysilane, 99.9% , Tetraethoxysilane, 98% , Tetraethoxysilane, 99+% , Tetraethoxysilane, 99.999+% (metals basis) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 100g, 500g, 2kg, 2500ml, 100ml, 500ml, 50g, *4x500g.