Quantitative structure-activity relationship (QSAR) 

Structure-activity relationship (SAR) and quantitative structure-activity relationship (QSAR) models, collectively called (Q)SARs, are mathematical models that can be used to predict the physicochemical, biological, and environmental fate properties of compounds from their chemical structure. (Q)SAR approaches include a variety of computerized and non-computerized tools and approaches, whose basic principle is that toxicity is a function of chemical structure, and include QSAR and SAR, Grouping and Read-Across.

OECD groups with activity related to (Q)SAR approaches are: