Das Projekt "46th Congress of the European Societies of Toxicology, Dresden, 13.09. - 16.09.2009" wird vom Umweltbundesamt gefördert und von Universität Halle-Wittenberg, Universitätsklinikum Halle (Saale), Institut für Umwelttoxikologie durchgeführt. It is our great pleasure to invite you to our Scientific Workshop on Safety Assessment and Regulation of Nanomaterials to be held at the International Conference Centre Dresden, Germany. Nanotechnology is a powerful tool to optimize technical processes or to generate new materials with exciting functionalities. High expectations are connected to products of nanotechnology with regard to energy efficiency, new materials, electronics, solutions to decrease energy needs for information technologies or data storage. Following introduction of nanomaterials in new technologies, regulators, developers and the producers are confronted with a growing list of questions addressing the safety of nanomaterials for consumers and environment. The participants are invited to give their input into the discussion on the long term safe use of nanoproducts with regard to work place, human health and environment. The complexity of the ongoing risk discussion is a challenge to demonstrate the ability of toxicological work in academia, industry and regulation. It is also a big chance to bring our expertise into society on our common way to find the right balance between chances of new technologies and level of acceptance of remaining risks. The scientific program will be a variety of opportunities to share knowledge lecture sessions and a poster session. Perspective of Regulation and Ethical demands, Products of Nanotechnology in use and under development, Exposure and uptake, Possible health hazards, New Functionalities of nanomaterials, Information Requirements for Safety Assessment of Nanomaterials, Nanomaterials in the Environment, Wrapping up Plenum or Working group.