CAS 2172677-19-7 appears in our catalog under these names: Azido–PEG23–amine, H2N-PEG(23)-N3, Azido-PEG23-amine 98%, Azido-PEG23-amine, 98%, 98%, Azido-PEG23-amine, 99.93%. Offered by: GLPBio, Iris Biotech, Ambeed, Chemat, MedChemExpress. Available pack sizes: 100mg, 1g, 50mg, 250mg, 25 mg, 50 mg, 100 mg.