Information on Metam-sodium (see also Methyl Isothiocyanate (MITC))
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: Metam-sodium (see also Methyl Isothiocyanate (MITC))
Type of Pesticide: Antimicrobial, Fungicide, Herbicide, Insecticide, Nematicide
California Registration: Yes
EPA Registration: Yes
Fumigant: Yes
California Restricted Material: Yes
Toxic Air Contaminant (TAC): Yes
Volatile Organic Compound (VOC): Yes
Potential Groundwater Contaminant: No
Reevaluation Status: Concluded
Chemical Class: Organosulfur
DPR Chemical Code: 233
Recent Reports and Announcements
Risk Evaluation and Mitigation Documents
- August 2017 - Close-Out Memorandum for the Mitigation of Acute Occupational Exposures from Methyl Isothiocyanate (MITC)-Generating Pesticides - English pdf
- June 2017 - Methyl Isothiocyanate (MITC) - Calculation of Intermediate (1-month) and Annual Residential Exposures and Risk Using Measured Air Concentrations from the Ambient Air Monitoring Network - English pdf
- August 2016 - Update to the Critical Subchronic and Chronic Points of Departure and Associated Reference Exposure Levels Evaluated in 2003 RCD - English pdf
- June 2015 - Completion of Methyl Isothiocyanate (MITC) Mitigation for Residents and Bystanders - English pdf
- May 2015 - ENF 2015-08 - Revised Recommended Permit Conditions
- May 2013 - ENF 2013-09 - Soil Fumigant 2012 Labeling and Permit Conditions - Questions and Answers
- March 2013 - ENF 2012 -21 - Soil Fumigant Phase 2 Label Implementation - Enforcement Status, and Revisions to Restricted Materials and Permitting Compendium Volume 3
- August 2012 - ENF 2012 -16 - Soil Fumigant Label Changes - Phase 2
- October 2011 - ENF 2011-25 - Soil Fumigant 2010 Labeling and Permit Conditions - Questions and Answers
- April 2011 - ENF 2011-14 - Updates to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium
- March 2011 - ENF 2011-09 - U.S. EPA Soil Fumigant Label Changes
- November 2010 - ENF 2010-22 - Recommended Permit Conditions for Metam Sodium, Metam Potassium, and Dazomet
- September 2008 - ENF 2008-25 - Updates to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium
- August 2008 - Calculation of Eight-Hour Maximum Methyl Isothiocyanate Flux from Dazomet Applications - English pdf
- August 2008 - ENF 2008-23 - Director's Decision to Approve Metam-Potassium And Metam-Sodium Sprinkler 4:00 A.M. Start Method
- July 2008 - ENF 2008-21 - Volatile Organic Compounds (VOC) Field Fumigation Emission Reduction Regulations
- June 2008 - ENF 2008-17 - Updates to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium
- May 2008 - ENF 2008-013 - Director's Decision to Approve Drench Application Method of Metam-Potassium or Metam-Sodium and Clarification to Nighttime Application Methods of Metam-Sodium
- April 2008 - ENF 2008-012 - Updates to Volume 3, Restricted Materials and Permitting, Pesticide Use Enforcement Program Standards Compendium - Director's Decision to Approve Two Additional Nighttime Application Methods of Metam-Sodium
- March 2008 - ENF 2008-005 - Director's Decision to Approve Two Additional Nighttime Application Methods of Metam-Sodium
- February 2007 - Development of Additional Methyl Isothiocyanate Buffer Zones for the Metam Sodium Mitigation Proposal - English pdf
- April 2006 - Dazomet Flux Analysis and Recommendations for Future Study - English pdf
- November 2005 - Estimation of Methyl Isothiocyanate Air Concentrations Associated with Priority Case Number 026-KER-05 - English pdf
- February 2005 - Variability in Daytime Stability Class Designation under Partly Foggy Conditions in a Monitoring Study - English pdf
- July 2004 - Risk Characterization Document (Metam-Sodium) - English pdf
- July 2003 - Risk Characterization Document Methyl Isothiocyanate (MITC) - English pdf
- July 2003 - ENF 2003-026 - Metam-Sodium Applications, Summer 2003
- December 2002 - Risk Management Directive - Metam-Sodium and MITC-Generating Pesticides - English pdf
- August 2002 - Director's Proposed Decision Concerning Methyl Isothiocyanate as a Toxic Air Contaminant - English pdf
- August 2002 - Toxic Air Contaminant (TAC) Assessment - Scientific Review Panel's Findings - English pdf
- August 2002 - Evaluation of Methyl Isothiocyanate as a Toxic Air Contaminant Part C - Human Health Assessment - English pdf
- July 2002 - ENF 2002-032 - Metam-Sodium Applications, Summer 2002
- February 2002 - OEHHA Revised Findings on the Health Effects of Methyl Isothiocyanate - English pdf
- August 2001 - ENF 2001-041 - Dazomet and Potassium N-methyldithiocarbamate on Restricted Materials List - English pdf
- December 2000 - ENF 2000-046 - Emergency Regulation Designating Dazomet and Potassium N-methyldithiocarbamate Restricted Materials - English pdf
- November 2000 - ENF 2000-044 - Permit Conditions for Applications of Metam-Sodium and Potassium N-methyldithiocarbamate (Metam-Potassium) Products - English pdf
- November 2000 - ENF 2000-044 - Permit Conditions for Applications of Metam-Sodium and Potassium N-methyldithiocarbamate (Metam-Potassium) Products - English pdf
- March 2000 - ENF 2000-010 - Draft Suggested Permit Conditions for Metam-Sodium Applications
- October 1991 - Monitoring of the Cantara Metam-Sodium Spill - English pdf
Historic Documents
- January 2022 – Presentation on Air Monitoring of Workers During Loading and Application of Fumigants
- July 2010 – WHS Branch Involvement Related to the Investigation of Priority Illness Episode 26-Ker-05 (Project 0508)
- May 2010 – Pesticide Registration and Evaluation Committee Meeting Agenda
- May 2010 – Pesticide Registration and Evaluation Committee Meeting Minutes
- May 2010 – Presentation on Proposed Mitigation Measures for MITC Generating Pesticides
- April 2010 – A Worker Health and Safety Investigation of Fieldworker Exposure To Methylisothiocyanate After a Metam Sodium Application; Priority Illness 60-Mon-08 (Project 0802)
- November 2009 – Agricultural Pest Control Advisory Committee Meeting Agenda
- November 2009 – Agricultural Pest Control Advisory Committee Meeting Minutes
- July 2009 – Request for Comments on Proposed Mitigation Measures of Metam Sodium, Metam Potassium and Dazomet
- November 2008 – Agricultural Pest Control Advisory Committee Meeting Agenda
- November 2008 – Agricultural Pest Control Advisory Committee Meeting Minutes
- August 2008 – Environmental Monitoring Results of Multi-Fumigant Applications in Manteca, California 2005
- July 2008 – Environmental Monitoring Results of Basamid®G (Dazomet) Application in Watsonville, California 2006
- December 2007 – Draft Metam Sodium/Metam Potassium Mitigation to Control Off-Site and Bystander Short-Term Exposure
- September 2007 – An Evaluation Of Illnesses Associated With Exposure To Agricultural Uses Of Metam Sodium, Metam Potassium, And Dazomet
- April 2007 – Control Measures (En Español)
- April 2007 – Agricultural Pest Control Advisory Committee Meeting Agenda
- April 2007 – Agricultural Pest Control Advisory Committee Meeting Minutes
- January 2007 – Mitigation Proposal
- October 2005 – Flux Estimation Calculated from a Sprinkler Application of Methyl Isothiocyanate
- July 2005 – Illnesses Related to Shank Application of Metam-Sodium, Arvin, California, July 2002
- June 2005 – Monitoring a 1,3-Dichloropropene/Metam Sodium Application in Del Norte County (Appendices, Laboratory Method)
- March 2005 – Monitoring an Untarped Bedded Drip Application of Metam Sodium in Merced County-Spring 2004 (Attachments)
- December 2004 – Determination of MITC Soil Flux Density and Emission Ratio from a Field Following a Tarped Bed Drip Application of Metam-Sodium
- June 2004 – Estimation of Exposure of Persons in California to Metam-Sodium during Soil Applications of Products Containing Metam-Sodium
- June 2004 – Final Report for the 2002 Application Air Monitoring for Metam Sodium Breakdown Products in Ventura County (Appendices)
- January 2004 – Final Report for the 2001 Ambient Air Monitoring for Chloropicrin and Metam Sodium Breakdown Products in Monterey and Santa Cruz Counties (Appendices)
- November 2003 – Final Report for the 2001 Ambient Air Monitoring for Chloropicrin and Metam Sodium Breakdown Products in Kern County (Appendices)
- 2003 – Methyl Isothiocyanate (MITC): Risk to Humans Following Agricultural Applications of Metam Sodium
- 2003 – Illnesses Associated with a November 1999 Sprinkler Application of Metam Sodium in Earlimart, CA
- August 2002 – Executive Summary
- August 2002 – Part A: Environmental Fate
- August 2002 – Part B: Exposure Assessment
- August 2002 – Statistical Confidence that the Maximum 24-Hour MITC Concentration Was Captured in the 2000 Lompoc Fumigant Monitoring
- July 2002 – Comments on Metam-Sodium Risk Characterization Document
- January 2002 – Response to Comments of the Metam-Sodium Task Force on the California Department of Pesticide Regulation Exposure Assessment Document for Metam-Sodium
- January 2002 – Response to Comments on Metam-Sodium Exposure Assessment Document (HS-1703)
- August 2001 – Illness Related to Exposure to Metam-Sodium Byproducts in Earlimart, California in November 1999
- November 2000 – Metam Sodium: In Vitro Absorption Through Rat and Human Skin
- November 1999 – Revised Evaluation of Potential Chronic and Subchronic Exposure to Methyl Isothiocyanate Using Pesticide Use Report Data
- June 1998 – Dermal Absorption of Tralomethrin, Metam-Sodium, Tribufos, Azinphos-Methyl, and Amitraz in Rats
- June 1997 – Ambient Air Monitoring for MIC and MITC After Soil Injection Application of Metam Sodium in Kern County during August 1995 (Appendices)
- June 1994 – Air Monitoring for Methyl Isothiocyanate during a Sprinkler Application of Metam-Sodium Executive (Summary)
- May 1994 – Metam Sodium - Methods of Application and Annual Number of Occupational Exposure Days
- April 1994 – Ambient Air Monitoring for MITC in Kern County During Summer 1993 (Appendices)
- April 1994 – Ambient Air Monitoring for MITC in Kern County During Summer 1993 After a Ground Injection Application of Metam Sodium to a Field (Appendices)
- November 1993 – Comments on the Use of Vaporooter and "Generic" Use of Metam Sodium for Treating Sewer Systems
- July 1993 – Ambient Air Monitoring in Contra Costa County During March 1993 After an Application of Metam Sodium to a Field (Appendices)
- July 1993 – Metam Sodium: In vivo Dermal Absorption in the Rat and Stability Determination of Aqueous Solution