CAS 3069-21-4 appears in our catalog under these names: Dodecyltrimethoxysilane, n-Dodecyltrimethoxysilane, 95% , Dodecyltrimethoxysilane, >93.0%(GC), Dodecyltrimethoxysilane 98%, n-Dodecyltrimethoxysilane, 98%, 98%. Offered by: GLPBio, Thermo Scientific (Alfa Aesar), TCI, Ambeed, Chemat. Available pack sizes: 500g, 25g, 100g, 250g, 1000g, 1kg.