CAS 17948-05-9 appears in our catalog under these names: 11–CHLOROUNDECYLTRIMETHOXYSILANE, (11-Chloroundecyl)trimethoxysilane 95%, (11-Chloroundecyl)trimethoxysilane, 95%, 95%, Silane, (11-chloroundecyl)trimethoxy-, 95%. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 10g, 1g, 5g, 25g.