PAN Pesticides Database - Chemicals

Dimethoate - Identification, toxicity, use, water pollution potential, ecological toxicity and regulatory information

Note: See Working with the Information on this Page section below for important notes about this data.

This database and website are updated and enhanced by Pesticide Action Network North America (PANNA). The project is made possible by our Sponsors and by PANNA general funds. We need your support to maintain and improve this system. Please support the database and website — donate to PANNA.

Identifying information, including synonyms, ID numbers, use type, chemical classification, a link to a list of all products containing this chemical and a list of the top crops this pesticide is used on in California.
Signs and symptoms of poisoning, first aid, and links to treatment information for this chemical.
Link to information on toxicity to humans, including carcinogenicity, reproductive and developmental toxicity, neurotoxicity, and acute toxicity.
Links to world-wide registration status as well as regulatory information for the U.S. and California.
Water quality standards and physical properties affecting water contamination potential.
Toxicity to aquatic organisms.
List of chemicals in the same family, including breakdown products, salts, esters, isomers, and other derivatives.
 

Chemical Identification and Use for Dimethoate

Basic Identification Information About This Chemical
Chemical Name: Dimethoate
CAS Number: 60-51-5
U.S. EPA PC Code: 035001
CA DPR Chem Code: 216
Molecular Weight: 229.3
Molecular Structure:
Use Type: Insecticide
Chem Class: Organophosphorus
View Related Chemicals
 
Additional Resources About This Chemical Class and Use Type
Historical Use of this Chemical
Top five crops and sites for this pesticide in California
Alfalfa for Forage   Tomatoes for Processing   Dried Beans   Corn for Forage   Cotton  
View All Crops and Sites
 
Other Names for this Chemical
About Chemical Synonyms
(US EPA PC Code ) , 035001 (US EPA PC Code Text ) , 171 (PDP Code) , 216 (CA DPR Chem Code) ) , 60-51-5 (CAS number) , 60515 , 60515 (CAS number without hyphens) , Cygon , DeFend , Dimethoaat , Dimethoat , Dimethoate , Dimethoate (ANSI) , DIMETHOATE (CA DPR Chem Code Text ) , Dimetoato , Dimeto?t , ENT-24650 , O,O-Dimethyl phosphorodithioate, S-ester with 2-mercapto-N-methylacetamide , O,O-Dimethyl S-((methylcarbamoyl)methyl) phosphorodithioate , O,O-Dimethyl S-(N-(methylcarbamoyl)methyl) phosphorodithioate , OMS 94 , Phosphorodithioic acid, O,O-Dimethyl S-[2-(methylamino)-2-oxoethyl] ester , Phosphorodithioic acid, S-((methylcarbamoyl)methyl O,O-dimethyl ester , Rebelate , Rogor
 
Products Containing This Chemical
Current and historic U.S. registered products
View U.S. Products All Products Currently Registered Products
 

Signs and Symptoms of Dimethoate Poisoning

NOTE! There may be other diseases and chemicals that have similar symptoms.

If you have a poisoning emergency in the United States call 1-800-222-1222.
If the victim has collapsed or is unconscious, call 911.

Dimethoate is a Organophosphorus compound.

Report a Poisoning

Symptoms of Poisoning with Organophosphorus Compounds
Find Products Containing this Chemical

- Excessive salivation, sweating, rhinorrhea and tearing.
- Muscle twitching, weakness, tremor, incoordination.
- Headache, dizziness, nausea, vomiting, abdominal cramps, diarrhea.
- Respiratory depression, tightness in chest, wheezing, productive cough, fluid in lungs.
- Pin-point pupils, sometimes with blurred or dark vision.
- Severe cases: seizures, incontinence, respiratory depression, loss of consciousness.
- Cholinesterase inhibition.

Source for Group Symptoms: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 4.

Treatment for Organophosphorus Poisoning

See: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 4, page 40.

 
Symptoms of Dimethoate Exposure from the International Chemical Safety Cards (ICSC)

Report a Poisoning

View full ICSC Cards: English   Español   Française   Chinese   Dutch   Finnish   German   Hungarian   Japanese   Swahili   Thai   Urdu  
NOTE! PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!

Route of Exposure

Symptoms

First Aid

Inhalation Dizziness. Sweating. Laboured breathing. Nausea. Weakness. Pupillary constriction muscle cramp excessive salivation. Fresh air rest. Artificial respiration if indicated. Refer for medical attention.
Skin MAY BE ABSORBED! (Further see Inhalation). Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes Redness. Pain. First rinse with plenty of water for several minutes (remove contact lenses if easily possible) then take to a doctor.
Ingestion Abdominal cramps. Convulsions. Diarrhoea. Unconsciousness. Vomiting. (Further see Inhalation). Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Rest. Refer for medical attention.
Notes for ICSC Information
Other melting points: 43-45C (technical grade). Depending on the degree of exposure periodic medical examination is indicated. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. If the substance is formulated with solvent(s) also consult the card(s) (ICSC) of the solvent(s). Carrier solvents used in commercial formulations may change physical and toxicological properties. Cygon Fostion MM Perfekthion Rogor and Roxion are trade names.
 

Toxicity Information for Dimethoate

  Note: Information for many chemicals is incomplete and may not be fully representative of effects on humans. Why?

Summary Toxicity Information

PAN Bad Actor
Chemical
1
Acute
Toxicity
2
Carcinogen Cholinesterase
Inhibitor
Ground
Water Contaminant
Developmental or
Reproductive Toxin
Endocrine
Disruptor
Possible
Potential
Suspected
 
Indicates high toxicity in the given toxicological category. Indicates no available weight-of-the-evidence summary assessment. For additional information on toxicity from scientific journals or registration documents, see the "Additional Resources for Toxicity " section of the chemical detail page.
1. PAN Bad Actors are chemicals that are one or more of the following: highly acutely toxic, cholinesterase inhibitor, known/probable carcinogen, known groundwater pollutant or known reproductive or developmental toxicant. NOTE! Because there are no authoritative lists of Endocrine Disrupting (ED) chemicals, EDs are not yet considered PAN Bad Actor chemicals.
2. The acute toxicity reported on this page is of the pure chemical ingredient only and may not reflect the acute toxicity of individual pesticide products. To view acute toxicity of individual products, click on 'View Products' link in the 'Chemical Identification' section above.

Detailed Toxicity Information

Acute Toxicity 2
Dimethoate
WHO Acute Hazard
TRI Acute Hazard
Material Safety Data Sheets
Acute rating from U.S. EPA product label
U.S. NTP Acute Toxicity Studies
      View Studies
Cholinesterase Inhibitor
II, Moderately Hazardous
Not Listed
Not Available
Moderately Toxic
Moderately to Highly Toxic

Yes
2. The acute toxicity reported on this page is of the pure chemical ingredient only and may not reflect the acute toxicity of individual pesticide products. To view acute toxicity of individual products, click on 'View Products' link in the 'Chemical Identification' section above.
 
Cancer Information
Dimethoate
IARC Carcinogens
U.S. NTP Carcinogens
California Prop 65 Known Carcinogens
U.S. EPA Carcinogens
TRI Carcinogen
Not Listed
Not Listed
Not Listed
C, Possible
Not Listed
 
Endocrine Disruption
Dimethoate
Illinois EPA list
Keith list
Colborn list
Benbrook list
Danish Inert list
EU list
Not listed
Not listed
Not listed
Not listed
Not Listed
Yes
 
Reproductive and Developmental Toxicity
Dimethoate
CA Prop 65 Developmental Toxin
U.S. TRI Developmental Toxin
CA Prop 65 Female Reproductive Toxin
CA Prop 65 Male Reproductive Toxin
U.S. TRI Reproductive Toxin
Not Listed
Yes
Not Listed
Not Listed
Not Listed
 
Chemicals of Special Concern
Dimethoate
PAN Bad Actors
PAN Dirty Dozen list
Yes
Not Listed
 

Water Pollution Potential and Criteria for Dimethoate

Water Pollution Potential

PAN Ground Water Contaminant Rating Potential
 
Physical Property Data Related to Water Contamination Potential
Water Solubility (Avg, mg/L)
Adsorption Coefficient (Koc)
Hydrolysis Half-life (Avg, Days)
Aerobic Soil Half-life (Avg, Days)
Anaerobic Soil Half-life (Avg, Days)
39,800
11.0
68.0
2.00
22.0
 
 

Water Standards and Criteria

Canada Drinking Water Standards and Criteria
g/L unless noted  
Maximum Acceptable Concentration (MAC) 20.0
Interim Maximum Acceptable Concentration (IMAC)
Aesthetic Objectives
WHO Water Quality Criteria
Concentration (μg/l unless otherwise noted) 6.0
Canadian Water Quality Guidelines for the Protection of Aquatic Life
g/L unless noted  
Fresh Water Guidelines 6.2 Notes: c
Salt Water Guidelines Insufficien
Canadian Water Quality Guidelines for the Protection of Agricultural Water Uses
g/L unless noted  
Irrigation Water Guidelines
Livestock Water Guidelines 3 (interim)
 

Regulatory Information for Dimethoate

International Regulatory Status

 
UNEP Persistent Organic Pollutant (POP)
UNEP Prior Informed Consent Chemical (PIC)
WHO Obsolete Pesticide
Not Listed
Not Listed
Not Listed
 

U.S. and California Regulatory Status

U.S. EPA Registered
U.S. EPA Hazardous Air Pollutant
U.S. EPA Minimum Risk Pesticide (25b list)

CA Registered
CA Groundwater Contaminant
CA Toxic Air Contaminant
Yes
Not Listed
No

Yes
Potential
Not Listed
 

Maximum Tolerance and Residue Levels

Codex Alimentarius
   (UN FAO Maximum Residue Limits)
U.S. Maximum Tolerance Levels
European Union Maximum Residue Levels
Go to web site

Go to web site

Go to web site
 

Ecotoxicity for Dimethoate

Note! Information for many chemicals is incomplete and may not be fully representative of effects on the environment. Why? Click on underlined terms for definitions and additional information.

Aquatic Ecotoxicity

All Toxic Effects for Organism Group
Organism Group Effects Noted
Amphibians Biochemistry, Cell(s), Development, Growth, Mortality, Physiology
Annelida Mortality
AquaticPlants Biochemistry, Growth, Physiology, Population
Cnidaria Growth
Crustaceans Avoidance, Enzyme(s), Mortality, Physiology
Fish Accumulation, Behavior, Biochemistry, Cell(s), Enzyme(s), Feeding Behavior, Growth, Histology, Intoxication, Morphology, Mortality, Physiology, Population, Reproduction
Fungi Ecosystem Process, Enzyme(s), Population
Insects Behavior, Development, Enzyme(s), Growth, Intoxication, Mortality, Population
Molluscs Accumulation, Behavior, Biochemistry, Enzyme(s), Genetics, Growth, Intoxication, Morphology, Mortality, Physiology, Reproduction
NematodesandFlatworms Enzyme(s), Population
Phytoplankton Accumulation, Biochemistry, Cell(s), Ecosystem Process, Enzyme(s), Growth, Mortality, Physiology, Population, Reproduction
Zooplankton Accumulation, Behavior, Growth, Intoxication, Mortality, Physiology, Population, Reproduction
~ Un-Assigned Growth, Mortality, Population, Reproduction
~Un-Assigned Population
View All Aquatic Ecotoxicity Studies and References
 
Summary of Acute Toxicity for Organism Group
Organism Group Average Acute Toxicity Acute Toxicity Range
Amphibians Slightly Toxic Slight to Very High Toxicity
Annelida Moderately Toxic Moderate Toxicity
Crustaceans Moderately Toxic Moderate to Very High Toxicity
Fish Slightly Toxic Not Acutely Toxic to Very High Toxicity
Insects Highly Toxic Moderate to Very High Toxicity
Molluscs Moderately Toxic Moderate to Very High Toxicity
Zooplankton Moderately Toxic Slight to Very High Toxicity
~ Un-Assigned Highly Toxic Highly Toxic
View All Acute Summaries
 

Terrestrial Ecotoxicity

Summary of Acute Toxicity for Organism Group
Organism Group Average Acute Toxicity Acute Toxicity Range
HoneybeesHighly ToxicHighly Toxic
Note: Population-level effects on honeybees may occur even if a pesticide has low acute toxicity. For example, certain pesticides interfere with honeybee reproduction, ability to navigate, or temperature regulation, any of which can have an effect on long-term survival of honeybee colonies. The neonicotinoids, pyrethroids and keto-enol pesticides are some types of pesticides causing one or more of these effects.
Honeybee Chronic Toxicity

Sorry, no honeybee chronic toxicity data available for this chemical. Try related chemicals.

Related Chemicals for Dimethoate

CAS Number Relation Reason Chemical Name Chem Detail Symptoms California Use Chem Use Type U.S. EPA Reg PAN Bad Actor
60-51-5 Parent P Dimethoate View View View Insecticide Yes Yes
Related 5a Desmethyl dimethoate (metabolite of dimethoate) View View View Breakdown product No Not Listed
116-01-8 Related 2 Dimethoate-ethyl View View View Insecticide No Yes
32586-82-6 Related 5a Dimethyl monosodium phosphate View View View Breakdown product No Not Listed
1113-02-6 Related 5b Omethoate View View View Insecticide, Breakdown product No Yes
 
Working with the Information on this Page

Click on underlined terms for definitions or go to the Pesticide Tutorial overview page.

Any underlined term with a book icon has additional information.

* Data marked with an asterisk indicates that this chemical is not explicitly listed on the corresponding list. Instead, it belongs to a group of chemicals that IS designated on the list. For example, if an agency assigns a classification of reproductive toxicant to "mercury compounds", that classification is applied to all mercury compounds in the PAN Pesticide database, which are then marked with an asterisk.

To print this page, choose Print. To export this data, choose Save As 'HTML Source' and open it in Excel or equivalent program.