The next version (3.3) of the OECD QSAR Toolbox can be downloaded free of charge here: http://www.qsartoolbox.org/download Please see release notes for full list of changes, which includes tens of thousands of new data points for a variety of existing databases as well as the following new functionalities: New databases: * Human Half-life (kM) – 1105 chemicals with 2045 half-life data points related to two endpoints: * Half Life (biotransformation) * Half-life (total Body) * ToxCast DB – database is implemented as a plugin tool including 1813 chemicals with 54669 data points * Developmental and Reproductive Toxicity (DART) database – 716 chemicals with 1430 data points separated as follows: * Developmental toxicity (716 data points) * Reproductive toxicity (714 data points) New Profilers: * Respiratory sensitization * DART scheme v1.0 * Protein binding alerts for Chromosomal aberration by OASIS v1.1 * Retinoic Acid Receptor Binding External SAR models: * Explosive properties (Impact sensitivity of nitroaliphatic compounds) * Photoinduced toxicity models with different domains * Photoinduced toxicity of PAH * Photoinduced toxicity based on 3T3 NRU data * Developmental and Reproductive Toxicity DART (P&G) Several new functionalities and usability improvements are also included. Kristie Sullivan Secretary, ASCCT ksullivan@xxxxxxxxxxx<mailto:ksullivan@xxxxxxxxxxx>