her chemical databases and allows users to filter and aggregate ecotoxicological test data in an easy way. It can either be accessed via <a href="http://standartox.uni-landau.de" class="uri">http://standartox.uni-landau.de</a> or this R-package <a href="https://github.com/andschar/standartox">standartox</a>. Ecotoxicological test data is used in environmental risk assessment to calculate effect measures such as <a href="https://en.wikipedia.org/wiki/Toxic_unit">TU - Toxic Units</a> or <a href="https://edild