CAS 135-20-6 appears in our catalog under these names: Cupferron,AR,98%, Cupferron, 97+% , Cupferron, >98.0%(HPLC), Cupferron, Cupferron, 97.50%. Offered by: GLPBio, Thermo Scientific (Alfa Aesar), TCI, Thermo Scientific (Acros), Chemat. Available pack sizes: 100g, 500g, 25g, 250g, 5g.