UTAX toner meets the different requirements of our systems. UTAX original toner is neither toxic nor carcinogenic. This is confirmed by the AMES test. The test results are stated in the security data sheets. Some of our copiers have a sealed self contained toner system that eliminates disagreeable physical contact with the toner. These advanced copiers leave no toner residues at all.Compatible Printers: Utax CLP 3621, Triumph-Adler CLP 4621