CAS 209542-49-4 appears in our catalog under these names: m–PEG2–CH2CH2COOH, m-PEG2-CH2CH2COOH 97%, 3-[2-(2-Methoxyethoxy)ethoxy] propionic acid, 98%, 98%, m-PEG2-CH2CH2COOH, 97.0%, 3-(2-(2-METHOXYETHOXY)ETHOXY)PROPANOIC ACID, 97%. Offered by: GLPBio, Ambeed, Chemat, MedChemExpress, Fluorochem. Available pack sizes: 100mg, 250mg, 1g, 5g, 25g, 10g, 50g, 100g.