The Organisation for Economic Co-operation and Development (OECD) has launched the latest version of the QSAR Toolbox, a software program for grouping and filling data gaps to assess the hazards of chemicals. New features include updates to existing profilers and metabolic simulators, the addition of new protein binding alerts for skin sensitisation, and inclusion of a new skin sensitisation database with curated local lymph node assay data from REACH registrations. The Toolbox can be accessed here.