CAS 10378-50-4 appears in our catalog under these names: Potassium perruthenate(VII), 97% , POTASSIUM PERRUTHENATE, Potassium perruthenate, 97%, 97%. Offered by: Thermo Scientific (Alfa Aesar), Sigma-Aldrich, Chemat. Available pack sizes: 1g, 5g, 500MG, 100mg, 250mg, 25mg.