CAS 2167807-41-0 appears in our catalog under these names: Bromo–PEG4–MS, 2-(2-(2-(2-Bromoethoxy)ethoxy)ethoxy)ethyl methanesulfonate, 95%, 95%, Bromo-PEG4-MS, 98.52%, Bromo-PEG4-MS, 98%. Offered by: GLPBio, Chemat, MedChemExpress, Fluorochem. Available pack sizes: 250mg, 100mg, 1g, 50 mg, 250 mg, 100 mg.