CAS 18623-11-5 appears in our catalog under these names: Octadecylsilane 98%, OCTADECYLSILANE, 97%, MIXTURE OF ISOMERS, Octadecylsilane, 98%, 98%, n-Octadecylsilane, 98%. Offered by: Ambeed, Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 1g, 5g, 25g, 100g, 500g.