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On this Page
  • Risk Evaluation and Mitigation Documents
  • Historic Documents

Information on Fipronil

See all Active Ingredients

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: Fipronil
Type of Pesticide: Insecticide, Insect Growth Regulator, Miticide
California Registration: Yes
Products Registered
EPA Registration: Yes
Fumigant: No
California Restricted Material: No
Toxic Air Contaminant (TAC): No
Volatile Organic Compound (VOC): No
Potential Groundwater Contaminant: No
Reevaluation Status: None
Chemical Class: Phenylpyrazole
DPR Chemical Code: 3995

Risk Evaluation and Mitigation Documents

  • March 2023 - Fipronil Final Risk Characterization Document - English pdf  
  • January 2023 - Response to Comments by the US Environmental Protection Agency regarding DPR’s 2021 Fipronil Draft Risk Characterization Document - English pdf  
  • January 2023 - Response to Comments by the Office of Environmental Health Hazard Assessment on DPR’s 2021 Draft Risk Characterization Document for Fipronil - English pdf  
  • January 2023 - Response to the Fipronil Task Force Request for Reconsideration of Findings in DPR’s 2021 Fipronil Draft Risk Characterization Document - English pdf  
  • December 2022 - Assessment of Human Exposure to Fipronil - English pdf  
  • December 2022 - Response to Comments by the US Environmental Protection Agency on DPR’s Draft Human Exposure Assessment for Fipronil - English pdf  
  • December 2022 - Response to Comments by the Office of Environmental Health Hazard Assessment on DPR’s Draft Human Exposure Assessment for Fipronil - English pdf  
  • December 2022 - Response to the Fipronil Task Force Request for Reconsideration of Findings in DPR’s Draft Human Exposure Assessment for Fipronil - English pdf  
  • February 2017 - Problem Formulation Document Fipronil - English pdf  
  • August 2005 - ENF 2005-021 - Labeling Interpretation - Termidor® Sc Termiticide/Insecticide

Historic Documents

  • March 2021 – Presentation on Fipronil Draft Risk Characterization Document
  • January 2021 - Draft Risk Characterization Document
  • August 2016 – Problem Formulation Summary
  • August 2016 – Pesticide Registration and Evaluation Committee Meeting Agenda
  • August 2016 – Pesticide Registration and Evaluation Committee Meeting Minutes
  • August 2016 – Presentation on the Risk Assessment on Fipronil; DPR's New Process
  • August 2016 – Problem Formulation Summary of the Fipronil Risk Assessment
  • November 2001 – Initiation of Risk Assessment
  • December 1999 – Significance of Dermal Dose Levels in Dermal Absorption Studies of Pesticides
  • May 1999 – Dermal Absorption of Cyromazine, Diclofop-Methyl, Fenpropathrin, Fipronil, and MB 46513 in Rats
  • March 1999 – Dermal Absorption of 14C-Fipronil Regent 80 WDG in Male Rats (HWI 6224-210)
  • March 1999 – Dermal Absorption of 14C-MB 46513 in Male Rats (CHW 6224-230)
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