Toxicological cross-check

Flame retardants are invisible assistants in car seats, gasket sealants, furniture and even in aeroplanes. However, their ingredients are not always harmless. Empa researchers developed three innovative flame retardants and tested them for toxicity; not all of them passed the test. Researchers are constantly striving to develop better and safer flame retardants. For example, Sabyasachi Gaan's team at Empa's Advanced Fibers Laboratory, synthesised three new agents that have the same or improved flame retardancy as existing products. However, before a flame retardant is ready for mass production, it is essential to ensure its safety for humans. The fact that a toxicological evaluation is beneficial prior to use is highlighted by the example of the flame retardant TCCP, which was only classified as toxic to humans after its launch and must now be gradually removed from the market.