Das Projekt "Multinationale Umsetzung zur Wiederverwertung gebrauchter Chemikalien im Produktionsprozess" wird vom Umweltbundesamt gefördert und von Merck KGaA durchgeführt. Currently, most chemical production sites dispose of used chemicals. This means that these chemicals end up in incinerators or waste disposal sites and will be lost as raw materials. At its site in Darmstadt, Merck has already gained experience in returning these chemicals back to the production process through retro-logistics. This concept avoids waste and minimizes resource consumption. This project is designed to allow technology transfer to 11 other EU member countries where Merck has sites. To return used chemicals into the production process, different pre-requisites must be fulfilled: 1) To return big volumes, adequate analytical tools to identify the waste are needed; 2) To return 10000 laboratory chemicals, up to 10 kg an EDP on-line management is essential; 3) In the case of liquid chemicals, the creation of a logistics infrastructure for the returning of recyclable containers is required; 4) There is also a necessity to adapt all transport documents to the laws and rules of the different countries involved.