CAS 12137-20-1 appears in our catalog under these names: Titanium(II) oxide, 99.5% (metals basis) , Titanium(II) oxide, 99.9% (metals basis) , Titanium(II) oxide pellets, 99.9% (metals basis) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 5g, 25g, 100g, 500g.