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United States Environmental Protection Agency
Pesticides: Organophosphate Pesticides
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Chemical Review Manager: Tom Myers (, 703-308-8589if there are any accesibility issues please call the chemical review manager.


Documents related to EPA's review of this pesticide can be found in the docket.
      Go to to access the electronic docket.
      Select "Advanced Search", then "Docket Search"
      In the "Keyword" field type the chemical name or insert the applicable "Docket ID number."
       (example: EPA-HQ-OPP-2005-9999)
      Click the "Submit" button.
Follow the instructions on the web site to view the index for the docket, access available documents, and submit comments.

Many documents are in PDF format and require the Acrobat Reader.

Docket ID Numbers

  • OPP-34203

Notice to Distributors, Retailers and PCOs Regarding Chlorpyrifos Products Labeled for Pre-Construction Termite Use - August 30, 2005 (173 KB, PDF, 5 pages)

Meeting with Univar USA Inc. and Arizona Chemical Group Inc. - June 17, 2005 (111 KB, 6 pgs., PDF)

April 26, 2004 Letter to NRDC - Public notice required by Amended Partial Consent Decree in Natural Resources Defense Council, et al., v. Whitman with regard to those worker risks determined to be an unreasonable adverse effect on the environment as identified in the Interim Reregistration Eligibility Decision for chlorpyrifos.

Federal Register Notices

Chlorpyrifos Interim Reregistration Eligibility Decision (IRED) (September 28, 2001)

Settlement Agreement (June 8, 2000)

Revised Risk Assessments (Released August 16, 2000)

Preliminary Risk Assessments

EPA Correspondence

Registrant Comments

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