CAS 309916-91-4 appears in our catalog under these names: Br–PEG6–C2–acid, Br-PEG6-C2-acid 98%, Br-PEG6-CH2CH2COOH, 98%, 98%, Br-PEG6-C2-acid, Br-PEG6-C2-acid, 98%. Offered by: GLPBio, Ambeed, Chemat, MedChemExpress, Fluorochem. Available pack sizes: 1g, 250mg, 500mg, 100mg, 50 mg, 100 mg, 25 mg, 1 g.