Methyl Parathion

Chemical Review Manager: Laura Parsons, 703-305-5776

Many documents are in PDF format and require the Acrobat Reader. New documents may be available from EDockets, EPA's electronic docket system.  To find open dockets related to this chemical, click the button below. Note that sometimes you may need to come back to this page and click the Find button a second time in order to get to the listing of dockets. 

Hazard Assessment of the Organophosphates (264 KB, PDF)

FQPA Safety Factor Recommendations for the Organophosphates (79 KB, PDF)

The EPA Administrator announced on August 2, 1999, acceptance of voluntary cancellation of many of the most significant food crop uses of methyl parathion.  A fact sheet summarizes the risk management decision.

Frequently Asked Questions

Docket Index (lists documents available in paper format from the OPP Public Regulatory Docket)

Federal Register Notices:

• June 2, 2004 (Comment period ending August 2, 2004)
• F.R. Notice Vol. 64, Number 156, Pages 44219-44220
  (Comment period ending Oct. 12, 1999)
• F.R. Notice Vol. 63, Number 243, Pages 70126-70127
  (Comment period ending Feb. 16, 1999)

Environmental Fate and Effects

• Environmental Fate and Effects Preliminary Risk Assessment (430 KB, PDF)
  • Appendix 1 - Laboratory Toxicity Test (147 KB, PDF)
  • Appendix 2 - Bee Incidents (39 KB, PDF)
  • Appendix 3 - Distribution of North American Breeding and Wintering Ducks (205 KB, PDF)
  • Appendix 4 - Bird species observed in corn field studies (50 KB, PDF)
  • Appendix 5 - Aquatic and Terrestrial Incidents (34 KB, PDF)
  • EFED Chapter, Revised (433 KB, PDF)
• Revised Environmental Fate and Effects Assessment (274 KB, PDF) (Released 08/10/99)

Health Effects

• Health Effects Preliminary Assessment (208 KB, PDF)
  • Occupational and Residential Exposure Assessment and Recommendations (245 KB, PDF)
  • Review of Incident Reports (41 KB, PDF)
  • Residue Chemistry Chapter (361 KB, PDF)
  • Toxicology Chapter (204 KB, PDF)
  • Outcome of the Health Effects Preliminary Assessment Metabolism Assessment Review Committee (17 KB, PDF)
  • Hazard Identification Committee Report (68 KB, PDF)
• Health Effects Revised Assessment (238 KB, PDF) (Released 08/10/99)
• Attachment 1 - Hazard Identification Committee Report (160 KB, PDF)
• Attachment 2 - Re-evaluation of Dietary Endpoint and Non-dietary Endpoint Selection and Dermal Absorption Factor (115 KB, PDF)
• Attachment 3 - Revised Toxicology Chapter (187 KB, PDF)
• Attachment 4 - Revised Residue Chemistry Chapter (352 KB, PDF)
• Attachment 5 - The Outcome of the HED Metabolism Assessment Review Committee Meeting Held on March 11, 1998 (114 KB, PDF)
• Attachment 6 - Pre-mitigation Acute Dietary Monte Carlo Assessment (128 KB, PDF)
• Attachment 7 - Pre-mitigation Chronic Dietary Assessment (100 KB, PDF)
• Attachment 8 - Post-mitigation Acute Dietary Monte Carlo Assessment (122 KB, PDF)
• Attachment 9 - Post-mitigation Chronic Dietary Assessment (100 KB, PDF)
• Attachment 10 - Raw Data Table (177 KB, PDF)
• Attachment 11 - Anticipated Residue Determination for Acute Dietary Assessment (144 KB, PDF)
• Attachment 12 - DEEM Memo (123 KB, PDF)
• Attachment 13 - Residue Data Files (116 KB, PDF)
• Attachment 14 - Revised Occupational and Residential Exposure Assessment and Recommendations (273 KB, PDF)
• Attachment 15 - Review of Methyl Parathion Incident Reports (137 KB, PDF)
• Attachment 16 - Revised Product Chemistry Chapter (131 KB, PDF)
• Overview of Methyl Parathion Refined Risk Assessment
• Methyl Parathion Summary
• Methyl Parathion Technical Briefing - August 2, 1999, Slide Presentation (213 KB, PDF)
• Response to Public Comments (6 KB, PDF)
  • Response to Comments on the Preliminary Health Risk Assessment (32 KB, PDF)
  • Response to Comments on the Aquatic Risk Assessment (40 KB, PDF)
  • Response to Comments on the Terrestrial Risk Assessments (48 KB, PDF)

EPA Correspondence

• Letter to JSC Requesting Written Comments on the Preliminary Human Health Risk Assessment (5 KB, PDF)
• Letter to JSC Requesting Written Comments on Environmental Preliminary Risk Assessment (5 KB, PDF)
• Letter to Griffin Company Requesting Written Comments on Preliminary Environmental Risk Assessment (5 KB,PDF)
• Letter to Griffin Company Requesting Written Comments on Environmental Preliminary Assessment (11 KB, PDF)
• EPA's Response to Comments on the Draft HED Chapter (December 7, 1998) (9 KB, PDF)
• Response to Comments Detailing Errors in the Draft EFED Chapter (December 16, 1998) (9 KB, PDF)

Registrant Comments

• Cheminova Agro's Comments on the Draft Health Effects Assessment (November 6, 1998) (917 KB, PDF)
• Cheminova Agro's Comments on the Draft Environmental Effects Assessment (November 12, 1998) (276 KB, PDF)

Publications | Glossary | A-Z Index | Jobs

EPA Home | Privacy and Security Notice | Contact Us