An official website of the United States government.

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, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

ToxCast Assay Annotation Data User Guide

The purpose of this document is to assist new data users in understanding how to use the annotation terms within the ToxCast High-Throughput Screening (HTS) and High Content Screening (HCS) data. Although it may be useful for the readers to have some prior knowledge of ToxCast assays from previous ToxCast publications, this data users guide is intended to provide sufficient exposure to annotation concepts and terminologies used.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.