CAS 18668-74-1 appears in our catalog under these names: 3-(2-Bromoethoxy)-1-propyne, 97%, 97%, 2-Bromoethyl(2-propynyl) ether 95%, Propargyl-PEG1-bromide, 99.19%, Propargyl-PEG1-bromide, 98%. Offered by: Chemat, Ambeed, MedChemExpress, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 5g, 10g, 250 mg, 1 g, 5 g.