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New OECD QSAR Toolbox version available


The new version of the OECD QSAR Toolbox, version 4.6, was released in May 2023.


It enhances connectivity with IUCLID, increases capacity to use external models and improves access to information about tested substances in ECHA’s chemicals database.


The OECD QSAR Toolbox development is a collaborative project between the European Chemicals Agency (ECHA), the Organisation for Economic Co-operation and Development (OECD), OECD member and partner countries, and the QSAR community.


This collaboration has led to a freely available software to support chemical hazard assessment. It promotes the use of assessment methods alternative to animals, minimising unnecessary animal testing without reducing the safety of human health and the environment.


To download the new version of the ToolBox


ToxNavigation offers training courses to learn how to use QSAR and read-across with freely available tools and how to use the ToolBox.

Click here for more information on our training.


The QSAR Toolbox is used worldwide in chemical hazard assessments, in both public and private sectors.


A significant change in QSAR Toolbox 4.6 is the improved connection with IUCLID. This allows better integration of data between the two platforms, making it easier for researchers to access and analyse relevant information.


The updated version also improves the use of external models that provide additional insights into chemical properties and safety. The update improves the performance and user-friendliness of the QSAR Toolbox.


Additionally, QSAR Toolbox 4.6 introduces a new feature for the REACH database, which contains experimental results submitted within REACH registrations. In the previous versions, data was organised by REACH registration only, which was good to visualise the data but not ideal for making predictions. With this update, users can now organise and use REACH data according to the actual substances which were used to generate toxicological data, making available four times more substances from REACH registrations to generate predictions.

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