CAS 5663-96-7 appears in our catalog under these names: 2-Octynoic acid, 98% , 2-Octynoic acid 98%, Oct-2-ynoic acid, 98%, 98%, 2-Octynoic acid, 98%. Offered by: Thermo Scientific (Alfa Aesar), Ambeed, Chemat, Fluorochem. Available pack sizes: 5g, 25g, 100g, 1g.