This is what the entry from the Zecchi site looks like to help in ordering: “ CHROMIUM OXIDE GREEN. Chemical composition: Chromium Trioxide. (Series: 3) .” Here is our best guess at the equivalent in Italian. This is from the Italian portion of the site: “ VERDE OSSIDO DI CROMO. Composizione chimica: Triossido di cromo. (Gruppo: 3).”