This is what the entry from the Zecchi site looks like to help in ordering: “ PRIMARY RED (MAGENTA). Chemical composition: Synthetic Organic Pigment (Quinacridone). (Series: 2) .” Here is our best guess at the equivalent in Italian. This is from the Italian portion of the site: “ ROSSO PRIMARIO (MAGENTA). Composizione chimica: Pigmento sintetico organico (Quinacridone). (Gruppo: 2).”