National Toxicology Program

Are you an informaticist or a biostatistician interested in toxicology? You may want to investigate using the NTP data downloads. Using the links below, you can access NTP data by downloading a few files.

Summary data on all NTP chemicals can be downloaded in a single file. If you would like more detailed data, you can download an individual study type. Currently, Bioassay, CHO Cell Cytogenesis, Drosophila, Micronucleus, Mouse Lymphoma, Rodent Cytogenetics, and Salmonella study types are the study types available for detailed data downloads.

NTP plans to add files for the Developmental, and Immunology study types. Be the first to learn when new study types and updated data are available by joining the NTP ListServ. NTP will update the data on a quarterly basis.

Format of NTP Data Downloads

The NTP used Extensible Markup Language (XML) to create these data files. XML is a free, open standard computer language with a set of rules that encodes documents in machine readable format. The XML files contain the data; schema files show how that data is organized and formatted. For additional information, see the World Wide Web Consortium's XMLTechnology Section.

Although you can open and read XML and schema files in a text editor, it is unwieldy to view the downloaded files this way. Most files will be too large to open in Excel. Typically, bioinformaticians or computer programmers would use these files to bring NTP data into your applications or databases.

Online Searching Remains Available

You can also use one of our online data searches to access test article and study data.

Contact

Please join our mailing list to receive NTP updates, including notifications when the XML data is updated and additional study types become available.

If you have any questions, comments, or concerns, contact us.

Notice

The NTP makes no representations and extends no warranties of any kind, either expressed or implied. There are no express or implied warranties of merchantability or fitness for a particular purpose.

NTP Test Article and Study Data

Formatting common to all XML files is described in the Custom Type Schema 22 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/customTypes.xsd) - February 23, 2012.

Data Type	Sample Data	All Data1	Schema	Date Updated
Test Articles	Sample Data 2 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/TestArticles-Example.xml)	All Data 472 KB (4.1 MB) (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/TestArticles-2013-Quarter-1.zip)	Schema 9 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/testarticles-v2.xsd)	April 4, 20132
Bioassay (CarTox)	Sample Data 727 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/CarTox-Example.xml)	All Data 89.5 MB (1.6 GB) (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/CarTox-2013-Quarter-1.zip)	Schema 25 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/cartox.xsd)	April 4, 20132
CHO Cell Cytogenetics	Sample Data 39 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/Chocytogene-Example.xml)	All Data 1 MB (29 MB) (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/Chocytogene-2010-Quarter-2.zip)	Schema 16 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/chocytogenestudies.xsd)	July 9, 2010
Drosophila	Sample Data 3 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/Drosophila-Example.xml)	All Data 79 KB (1.8 MB) (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/Drosophila-2012-Quarter-1.zip)	Schema 12 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/drosophilastudies.xsd)	April 16, 2012
Micronucleus	Sample Data 23 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/Micronucleus-Example.xml)	All Data 933 KB (22.7 MB) (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/Micronucleus-20130508-AdHoc.zip)	Schema 15 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/micronucleusStudies-v2.xsd)	May 8, 20132
Mouse Lymphoma	Sample Data 25 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/MouseLymphoma-Example.xml)	All Data 623 KB (14.8 MB) (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/MouseLymphoma-2011-Quarter-4.zip)	Schema 9 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/mouselymphomastudies.xsd)	March 2, 2012
Rodent Cytogenetics	Sample Data 125 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/RodentCytogenetics-Example.xml)	All Data 450 KB (13.2 MB) (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/RodentCytogenetics-2012-Quarter-1.zip)	Schema 17 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/rmcytogenestudies.xsd)	May 31, 2012
Salmonella	Sample Data 192 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/Salmonella-Example.xml)	All Data 8.2 MB (153 MB) (ftp://ehsappvlp03.niehs.nih.gov/ntp/xml/Salmonella-2013-Quarter-1.zip)	Schema 11 KB (ftp://ehsappvlp03.niehs.nih.gov/ntp/xsd/salmonellaStudies.xsd)	April 4, 20132

¹ To conserve file space, we have compressed the XML files using the zip file format. File sizes are shown in this format: compressed zip file size (uncompressed XML file size).
² Updated quarterly.