CAS 1137109-21-7 appears in our catalog under these names: Mal-amido-peg6-NHS, >95% (HPLC), Mal–amido–PEG6–NHS ester, mal-PEG(6)-NHS, Maleimide-PEG6-NHS Ester, >98.0%(HPLC), Mal-PEG6-NHS. Offered by: TRC, GLPBio, Iris Biotech, TCI, Biosynth. Available pack sizes: 100mg, 10mg, 50mg, 25mg, 1g, 0,1g, 0,25g, 1000mg.