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This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2025. This website is no longer updated and links to external websites and some internal pages may not work. More information »

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Computational Toxicology and Exposure Online Resources

  • Get Help from the Experts

    Not sure which tool is for you? Contact the Center for Computational Toxicology and Exposure to see how we can help. 

    Contact CCTE

EPA's Safer Chemicals program produces a variety of computational tools to assist users in decision-making, researching, and evaluating chemical information. These tools offer a wealth of chemistry, toxicity, and exposure data that is publicly accessible.

  • ChemExpo Knowledgebase

    The Chemical Exposure Knowledgebase (ChemExpo) is an interactive tool for exploring and searching information on how chemicals are used in commerce and in consumer products.

    ChemExpo Resource Hub
  • Cheminformatics Modules

    Image of pipette and chemical testing tube with chemical figures written in background and a corner of the periodic table also showing.

    Cheminformatics analysis modules provide high-quality chemical structures, experimental and predicted physicochemical properties, environmental fate and transport information, and linked toxicity data.

    Cheminformatics Resource Hub
  • CompTox Chemicals Dashboard

    The CompTox Chemicals Dashboard provides publicly-accessible chemistry, toxicity, and exposure information for over one million chemicals. This information includes physicochemical data, hazard data, and much more.

    CompTox Chemicals Dashboard Resource Hub
  • GenRA Tool

    pink, blue and purple graphic displaying chemical names

    The Generalized Read-Across (GenRA) tool is an algorithmic approach to permit objective and reproducible read-across predictions of in vivo toxicity and in vitro bioactivity.

    GenRA Resource Hub
  • ECOTOX Knowledgebase

    The Ecotoxicology (ECOTOX) Knowledgebase is a comprehensive database providing information on adverse effects of single chemical stressors to ecologically relevant aquatic and terrestrial species. 

    ECOTOX Resource Hub
  • SeqAPASS Tool

    The Sequence Alignment to Predict Across Species Susceptibility (SeqAPASS) tool is a fast, online screening tool that allows researchers and regulators to extrapolate toxicity information across species.

    SeqAPASS Resource Hub

Computational Toxicology and Exposure Informatics Resources

 EPA’s computational toxicology research efforts evaluate the potential health effects of thousands of chemicals. Types of available, open-source data include: high-throughput screening, rapid exposure and dose, animal toxicity, chemistry, and virtual tissues.

Access and download computational toxicology and exposure data and application programming interfaces (APIs):

CompTox Data and APIs

Contact Us About CompTox Tools to ask a question, provide feedback, or report a problem.
Last updated on December 2, 2024
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