CAS 83824-29-7 appears in our catalog under these names: CH2COOH–PEG6–CH2COOH, 3,6,9,12,15,18,21-Heptaoxatricosanedioic acid, CH2COOH-PEG6-CH2COOH 97%, 3,6,9,12,15,18,21-Heptaoxatricosanedioic acid, 97%, 97%, CH2COOH-PEG6-CH2COOH, 97.0%. Offered by: GLPBio, Biosynth, Ambeed, Chemat, MedChemExpress. Available pack sizes: 100mg, 250mg, 5000mg, 1g, 5g, 10g, 500mg, 1 g.