Active Ingredient: Azinphos-methyl
Human Health Risk Assessment and Mitigation
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Risk Characterization Documents (RCDs) estimate the nature and likelihood of adverse health effects in humans who may be exposed to pesticides.

Other Documents

  • December 1999 – Significance of Dermal Dose Levels in Dermal Absorption Studies of Pesticides (PDF)
  • June 1998 – Dermal Absorption of Tralomethrin, Metam-Sodium, Tribufos, Azinphos-Methyl, and Amitraz in Rats (PDF)
  • August 1996 – Compilation of Clothing Penetration Values: Harvesters (PDF)
  • May 1996 – Dislodgeable Azinphos-methyl Residues on Treated Pear Foliage (PDF)
  • March 1995 – Report on Air Concentrations near an Application of Azinphos-methyl in Glenn County During July 1994 (PDF)
    • Appendices (PDF)
  • December 1994 – Illnesses Associated with Exposure to Azinphos-methyl in California, 1982-1990 (PDF)
  • February 1994 – Guthion: Dermal Absorption Study (PDF)
  • September 1993 – Dermal and Urinary Monitoring of Peach and Apple Harvesters Exposed to Organophosphate Residues in Sutter, Stanislaus and Madera Counties, 1989 and 1990 (PDF)
  • August 1992 – Monitoring of Peach Harvest Workers Exposed to Azinphos-methyl Residues in Sutter County, California, 1991 (PDF)
  • February 1992 – A Study of Dermal and Inhalation Exposure of Mixer-Loaders to Pesticides While Using a Closed Mixing and Loading System (PDF)
  • April 1991 – Long and Short Intervals of Dermal Monitoring of Peach Harvesters Exposed to Foliar Azinphos-methyl Residues (PDF)
  • May 1990 – Dermal and Urinary Monitoring of Nectarine Harvesters Exposed to Azinphos-methyl Residues in Fresno County, California 1988 (PDF)
  • March 1990 – The Degradation of Azinphos-methyl Applied to Trellised Apples (PDF)
  • October 1989 – Degradation of Azinphos-methyl on Stone Fruit Foliage, 1988 (PDF)
  • October 1989 – Monitoring the Exposure of Workers During the Mixing, Loading and Application of Azinphos-methyl to Stone Fruit (PDF)
  • March 1988 – Degradation of Azinphos-methyl Residue on Plum Foliage, 1987 (PDF)
  • December 1987 – Monitoring and Observation of Peach Tree Limb Proppers to Estimate Potential Exposure to Guthion and Zolone, Stanislaus County, 1985 (PDF)
  • October 1987 – A Degradation Study of Dislodgeable Azinphos-methyl Residue on Tomato Foliage in San Diego County (PDF)
  • September 1987 – Degradation of Azinphos-methyl Residue on Pear Foliage, 1986 (PDF)
  • February 1987 – Comparison of Applicator Exposure to Azinphos-methyl Using Electrostatic and Conventional Air Blast Sprayers in California in 1986 (PDF)
  • November 1986 – A Profile of the Degradation of Dislodgeable Foliar Residue After Serial Azinphos-methyl (Guthion) Applications to Peaches, Stanislaus County, 1985 (PDF)
  • August 1986 – A Survey of Dislodgeable Organophosphate Residues on Selected Crops in Fresno and Merced Counties, at the Time of Harvest During Fall of 1985 (PDF)
  • July 1986 – Results of Comparison of Colorimetric Organophosphate Detectors with Gas Chromatographic Analysis in Detection of Azinphos-methyl Residues (PDF)
  • January 1986 – Report on Ambient Concentrations near Applications of Azinphos-methyl in Kern County During the Summer of 1987 (PDF)
  • August 1985 – A Study to Establish a Degradation Profile for Azinphos-methyl (Guthion) on Apple Foliage in Kern County During July 1984 (PDF)
  • January 1985 – Degradation of Dislodgeable Azinphos-methyl (Guthion) Residue on Apple Foliage, El Dorado County, 1984 (PDF)
  • January 1985 – Employee Exposure to Pesticide Residue and Nuisance Dust During the Mechanical Shaking and Sweeping of Almond Harvest During August and September 1984 (PDF)
  • May 1984 – Degradation of Dislodgeable Azinphos-methyl (Guthion) Residue on Peach Foliage After Low Volume Application in Stanislaus County, California, 1983 (PDF)
  • February 1984 – Degradation of Dislodgeable Residues of Azinphos-methyl Following Application to Apple Trees (PDF)
  • January 1984 – Results of Foliage Sampling of Peach Orchards in Sutter County, California, June 1981, Treated with Azinphos-methyl Nine Days After Application (PDF)
  • January 1982 – Analysis of Guthion Residues on Peach Foliage Before Expiration of Worker Safety Interval in Stanislaus County in California During June 1981 (PDF)
  • September 1981 – Report of Field Worker Illnesses in Stanislaus County During August 1980 Attributed to Excessive Exposure to Guthion and Its Oxon (PDF)
  • March 1978 - Studies of Residue of Parathion and Guthion on Peach Foliage at the Time of Expiration of the Worker Safety Intervals in San Joaquin and Stanislaus Counties in California in June 1977 (PDF)>
  • August 1977 – A Study of the Decay of Azinphos-methyl (Guthion) on the Foliage of Peach Trees in Stanislaus County, California, June-July 1977 (PDF)
  • July 1975 – Guthion Residue on Orange Trees, Tulare County (PDF)
  • June 1975 – Guthion Residue on Peach Trees, Sutter County (PDF)
  • November 1974 – Exposure on September 2 and 3, 1974 of 5 Persons to Residues of Guthion and Zolone in a Grape Vineyard in Fresno County California (PDF)
  • February 1968 – Organic Phosphate Poisoning of Peach Pickers in Stanislaus and Merced Counties, California in September 1967 (PDF)

RMDs identify pesticide exposures that require mitigation in order to further protect human health.

  • June 2005 – Risk Management Directive (PDF)
  • October 2014 – Completion of Mitigation (PDF)
  • February 2012 – Azinphos-methyl Mitigation (PDF)
  • November 2000 – Adoption of Exposure Mitigation Regulation (PDF)

Enforcement Letters

For document retrieval, please submit a request at our Public Records Portal (NextRequest).

For content questions, contact:

Christine Herrera
Worker Health and Safety Branch
1001 I Street, P.O. Box 4015
Sacramento, CA 95812-4015
Phone: (916) 445-4261

Brenna McNabb
Pesticide Registration Branch
1001 I Street, P.O. Box 4015
Sacramento, CA 95812-4015
Phone: (916) 445-0179