CAS 1317-39-1 appears in our catalog under these names: Copper(I) oxide, 99% (metals basis) , Copper(I) oxide, 99.9% (metals basis) , Copper(I) oxide, 97% , Copper(I) oxide, 97% (Cu + Cu{2}O Assay) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 25g, 100g, 500g, 2.5kg, 5g, 2500g, 2kg.