CAS 58626-38-3 appears in our catalog under these names: 3-Mal-Bz-NHS, 3–Maleimido–benzoic acid–OSu, N-Succinimidyl 3-maleimidobenzoate, 95% , 3-Maleimidobenzoic acid n-hydroxysuccinimide ester, 95%, 3-N-Maleimidobenzoic acid N-succinimidyl ester. Offered by: Iris Biotech, GLPBio, Thermo Scientific (Alfa Aesar), Combi-blocks, Biosynth. Available pack sizes: 1g, 250mg, 5g, 100mg, 500mg, 1000mg, 2000mg, 50 mg.