CAS 956494-20-5 appears in our catalog under these names: Biotin–PEG–azide (MW 1000), Biotin–PEG–azide (MW 5000), Biotin–PEG–azide (MW 600), Biotin–PEG–azide (MW 3400), Biotin–PEG–azide (MW 2000). Offered by: GLPBio, Iris Biotech, Biosynth, MedChemExpress. Available pack sizes: 5mg, 10mg, 100mg, 25mg, 50mg, 250mg, 500mg, 1g.