CAS 1620523-64-9 appears in our catalog under these names: Azide-C2-SS-C2-biotin/ 97.15% (existing batch purity), Azide–C2–SS–C2–biotin, Biotin-SS-N3, N-(2-((2-Azidoethyl)disulfaneyl)ethyl)-5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamide, 98%, 98%, Azide-C2-SS-C2-biotin, 99.84%. Offered by: TargetMol, GLPBio, Iris Biotech, Chemat, MedChemExpress. Available pack sizes: 1mg, 5mg, 10mg, 25mg, 50mg, 100mg, 250mg, 100 mg.