Information on Methamidophos
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: Methamidophos
Type of Pesticide: No actively registered products
California Registration: No
EPA Registration: No
Fumigant: No
California Restricted Material: Yes
Toxic Air Contaminant (TAC): No
Volatile Organic Compound (VOC): No
Potential Groundwater Contaminant: No
Reevaluation Status: None
Chemical Class: Organophosphate
DPR Chemical Code: 1697
Risk Evaluation and Mitigation Documents
Historic Documents
- June 2011 – Mitigation
- May 2006 – Risk Management Directive
- January 2005 – Exposure Assessment Document
- July 2004 – Worker Health & Safety Activities Following Methamidophos Drift Incident In Kern County (Project 0405)
- March 2004 – Comments on Position Paper on the Estimated Human Dermal Absorption of Methamidophos
- January 2004 – Final Report for the 2002 Application Air Monitoring for Chlorothalonil and Methamidophos in San Joaquin County (Appendices)
- November 2003 – Final Report for the 2002 Ambient Air Monitoring for Acephate and Methamidophos in Fresno County (Appendices, Corrections)
- October 2001 – WH&S Branch Activities and Results of Analyses Related to the Investigation of Priority Illness Episode 39-SOL-00 (Project 0004)
- October 2001 – In vivo Dermal Absorption Studies of Methamidophos in Rats, Monkeys, and Human Volunteers
- July 2001 – The Percutaneous Absorption of Methamidophos (SX-1757) in Male Rats
- July 2001 – A Dermal/Intravenous Cross Over Study to Determine the Dermal Absorption of [14C]-Methamidophos in Male Rhesus Monkeys
- July 2001 – Absorption, Excretion, Balance and Pharmacokinetics of 14C Radioactivity after Single Dose Dermal Application of One Dose Level of 14C Labeled Methamidophos from a Tamaron 600 SL Formulation Administered to Healthy Volunteers
- February 1995 – Illnesses Associated with Exposure to Methamidophos in California 1982-1990
- September 1994 – Risk Factors for Cholinesterase and Non-Cholinesterase Effects of Exposure to Organophosphate Insecticides in California Agricultural Workers, 1982-1990
- May 1986 – Degradation of Dislodgeable Foliar Residues of Methamidophos on Cauliflower and Broccoli in Ventura and San Luis Obispo Counties in 1984
- February 1986 – A Degradation Study for Dislodgeable Methamidophos (Monitor) Residue on Broccoli and Cauliflower Foliage in San Luis Obispo and Santa Barbara Counties, California
- December 1985 – A Degradation Study for Dislodgeable Methamidophos (Monitor) Residue on Broccoli and Brussels Sprouts Foliage in Monterey County, California
- December 1985 – A Degradation Study of Dislodgeable Methamidophos Residue on Tomato Foliage in San Diego County
- January 1985 – Employee Exposure to Pesticide Residue and Nuisance Dust During the Mechanical Shaking and Sweeping of Almond Harvest During August and September 1984