The consideration of mixtures of chemical substances in the regulatory assessment of environmental risks is getting into the focus of competent authorities. Recent developments particularly in the risk assessment of plant protection products and biocides require the consideration of mixture toxicity in certain cases in the future.

Based on the experience obtained in various research projects, we can conduct experimental studies with mixtures as well as apply established mixture toxicity concepts to theoretically predict the effects of mixtures based on the effects of the individual components.