Information on Methyl Parathion
Find information on the registration status, continuous evaluation and mitigation measures in California to regulate this active ingredient. An active ingredient is the chemical that makes a pesticide work on a target pest.
Active Ingredient: Methyl Parathion
Type of Pesticide: No actively registered products
California Registration: Yes
EPA Registration: Yes
Fumigant: No
California Restricted Material: No
Toxic Air Contaminant (TAC): Yes
Volatile Organic Compound (VOC): No
Potential Groundwater Contaminant: No
Reevaluation Status: None
Chemical Class: Organophosphate
DPR Chemical Code: 394
Recent Reports and Announcements
Risk Evaluation and Mitigation Documents
- December 2014 - Completion of Methyl Parathion Mitigation - English pdf
- October 2010 - Methyl Parathion Risk Characterization Document - English pdf
- February 2009 - ENF 2009-05 - Updates To Volume 3, Restricted Materials And Permitting, Pesticide Use Enforcement Program Standards Compendium
- April 2008 - ENF 2008-011 - 2008 Rice Pesticides Program
- April 2007 - ENF 2007-015 - 2007 Rice Pesticides Program
- February 2007 - Errata for the October 2004 Methyl Parathion Risk Characterization Document Dietary and Ambient Air Exposures - English pdf
- March 2006 - ENF 2006-008 - Rice Pesticides Program 2006
- March 2005 - ENF 2005-015 - Rice Pesticides Program 2005
- April 2004 - ENF 2004-006 - Rice Pesticides Program 2004
- March 2003 - ENF 2003-011 - Rice Pesticides Program 2003
- April 2002 - ENF 2002-012 - Rice Pesticides Program for 2002
- April 2001 - ENF 2001-017 - Rice Pesticides Program for 2001
Historic Documents
- April 2012 – Mitigation
- October 2010 – Exposure Assessment Document
- October 2004 – Risk Characterization Document
- December 2003 – A Study to Determine the Urinary Elimination of Para-Nitrophenol and Its Conjugates Following Dermal Exposure of Rats to Methyl Parathion
- December 2003 – Determination of Dermal Absorption of Methyl Parathion
- September 2003 – Preliminary Methyl Parathion Air Concentrations Measured Adjacent to Two Walnut Orchard Applications
- February 2000 – Office of Environmental Health Hazard Assessment's Findings
- November 1999 – Director's Proposed Decision
- October 1999 – Executive Summary
- October 1999 – Part A: Environmental Fate
- October 1999 – Part B: Exposure Assessment
- October 1999 – Part C: Human Health Assessment
- September 1999 – Scientific Review Panel's Findings
- August 1989 – Methyl Parathion Application Air Monitoring in Sutter County, May 1989
- May 1987 – Methyl Parathion Ambient Air Monitoring in Colusa and Sutter Counties (Corrections)
- April 1987 – Measurement and Computer Model Simulation of the Volatilization Flux of Molinate and Methyl Parathion From a Flooded Rice Field
- December 1985 – Monterey County Residential Air Monitoring
- September 1981 – Exposure of Greenhouse Workers to Encapsulated Methyl Parathion (Penncap-M) Being Used on Chrysanthymums in Santa Clara and San Mateo Counties in 1981
- May 1976 – Occupational Exposure Incidents in California in 1975 Involving Methyl Parathion
- July 1974 – Worker Safety Study on Methyl Parathion on Grapes