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Toxipedia is a free toxicology encyclopedia offering articles and resources about toxic chemicals (such as pesticides and endocrine disruptors), health conditions, ethical considerations, the history of toxicology, laws and regulation, and more. Our goal is to provide scientific information in the context of history, society, and culture so that the public has the information needed to make sound choices that protect both human and environmental health. (Photo: school children in Ghana, from Wikimedia.)

As a moderated wiki, Toxipedia offers a way for scientists, environmental health professionals, students, and concerned citizens to share their knowledge with the public for the benefit of the common good. We encourage everyone with an interest in topics related to toxicology to contribute content, whether it's a journal article, fact sheet, student paper, or essay. We offer Writers Guidelines as well as an editor who can help you to develop your piece. There are also many other ways to contribute

Toxipedia is a project of the Institute of Neurotoxicology and Neurological Disorders. INND is a nonprofit organization that distributes scientific information about the health and environmental impacts of toxic chemicals, thereby empowering the public and policy makers to make choices that create healthy communities and environments. View a two-page brochure summarizing INND's educational projects and history of accomplishments. We also assist other organizations with research and education projects through Toxipedia Web Development Services.

Structure of the Site

Toxipedia is a modified-wiki website powered by the Confluence system, which allows site administrators to restrict editing on some pages, disallow certain changes, and revert pages back to earlier versions, thus guaranteeing accuracy. Most pages, however, are open for editing upon receiving permission from us and are reviewed after each change. NOTE: Due to an increase in spam accounts, as of April 2016 we require that people who would like to edit or add pages contact us to receive permission. Please email editor Maria Williams at to request access. Thank you!

Benefits of a Wiki

  • Anyone with access to the Internet can edit or view Toxipedia, depending on the page. This creates an easy-to-use collaborative environment that is accessible from any computer.
  • No special software is needed to view or edit Toxipedia.
  • The wiki offers a place to store one copy of the piece of information. There is no need to pass around a document by email that everyone adds to.
  • Wikis allow for easy use of features like links, multiple pages, and attachments, which help build a content-rich environment.


Toxipedia was initiated on June 16, 2006 and shortly thereafter, Managing Editor Steve Gilbert, PhD, DABT hired Sean Foley as senior editor to begin adding content.

The first year of the site was dedicated toward creating content in each of the main parts of Toxipedia and showcasing some of the capabilities of the site. The History of Toxicology was the first area to be constructed and linked together. After building basic content with the help of a few interns, the site began soliciting authors. Some of the first outside authors were Rick Gleason, Todd Stedeford (who is also on the advisory board), Scott Jordan, Hardy Limeback, and Heather Gingerich.

The site's editors then began transferring material from Steve Gilbert's old website to Toxipedia. This provided the site with numerous Powerpoint presentations and Teaching Resources.

In May of 2008, the inaugural Advisory Board was announced.

Advisory Board

Main Article: Advisory Board
The inaugural Advisory Board was established in May 2008. The board is charged with helping to develop and implement strategies that will propel Toxipedia forward. Members include:

  • Darryl Duke, Managing Director of Stepstone Technologies, Inc.
  • Vanessa Fitsanakis, PhD, Assistant Professor and Chair of the Biology Department at King College in Bristol, TN.
  • Antoinette (Toni) Hayes, MS, Research Scientist II (Exploratory Toxicologist) at Wyeth (Andover, MA).
  • Richard Hurst, PhD, Professor Emeritus of Geology and Geochemistry at CSU, Los Angeles.
  • Hilary Karasz, PhD, Public Information Officer with a focus on Environmental Health at Public Health - Seattle & King County.
  • Rudy Richardson, ScD, ScM, Professor of Toxicology, Associate Professor of Neurology, Dow Professor of Toxicology at University of Michigan
  • Todd J. Stedeford, PhD, JD, DABT, Chief, Existing Chemicals Assessment Branch, Risk Assessment Division (7403M), Office of Pollution Prevention and Toxics, US Environmental Protection Agency.


Creating a Page

Main Article: User Guide

Anyone who is registered and has contacted us to request editing permission (please email is free to create a page. See the above link for detailed instructions.

Editing a Page

Main Article: User Guide
Toxipedia is a modified-wiki website and the site has different sections that require different levels of oversight. Some areas are completely open-source and editable by anyone. Other pages, especially those that are highly researched, are protected and editable only by site editors and administrators.

Quality Assurance

Main Article: Quality Assurance Review System
Toxipedia has developed a Quality Assurance Review System to ensure the accuracy of the information that is presented on the site. Some sections of the site are completely open source and governed by the users, while the majority of pages are written or edited by experts. The level of review is indicated by the Quality Assurance Review System.


Toxipedia is operated through the Institute of Neurotoxicology and Neurological Disorders, a nonprofit 501(c)3 corporation. The site is maintained by Stepstone Technologies and is a Confluence site.

Terms of Use

Main Article: Terms of Use



Toxipedia is a modified wiki website that provides the ability to edit a page to all users who are granted permission. Those privileges are managed by the site administrators. A vast majority of the pages do not have restrictions and are subject to editing by any registered user. Toxipedia administrators, however, have the right to reject any edits if they are deemed inaccurate or overly biased. 


Any of the trademarks, service marks, collective marks, design rights, or similar rights that are mentioned, used, or cited in the articles of the Toxipedia encyclopedia are the property of their respective owners. Their use here does not imply that you may use them for any other purpose other than for the same or a similar informational use as contemplated by the original authors of these Toxipedia articles under the GFDL licensing scheme. Toxipedia cannot grant any rights to use any otherwise protected materials. Your use of any such or similar incorporeal property is at your own risk.

Jurisdiction and Legality of Content

Publication of information found in Toxipedia may be in violation of the laws of the country or jurisdiction from where you are viewing this information. The Toxipedia database is stored on a server in Washington State and is maintained in reference to the protections afforded under local and federal law. Laws in your country or jurisdiction may not protect or allow the same kinds of speech or distribution. Toxipedia does not encourage the violation of any laws and cannot be responsible for any violations of such laws, should you link to this domain or use, reproduce, or republish the information contained herein.

Not Professional Advice

If you need specific advice (for example, medical, legal, financial, or risk management) please seek a professional who is licensed or knowledgeable in that area. 


The executive director and managing editor is Steven G. Gilbert, a toxicologist and author of A Small Dose of Toxicology. More information on this book is available on A Small Dose of ..., his website.

Maria M. Williams, editor, has been working in environmental health education and advocacy since 2003 and holds a BA in environmental studies from Oberlin College and a professional editing certificate from UC Berkeley.


See our internships page for a list of current and past interns.

List of authors and editors


Toxipedia marketing material This page has marketing material for all our web sites.


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