PAN Pesticides Database - Chemicals

Dimethyl phosphate - 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.

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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 Dimethyl phosphate

Basic Identification Information About This Chemical
Chemical Name: Dimethyl phosphate
CAS Number: 813-78-5
U.S. EPA PC Code:
CA DPR Chem Code:
Molecular Weight: 126.05
Use Type: Breakdown product
Chem Class: Unclassified
View Related Chemicals
Additional Resources About This Chemical Class and Use Type
Other Names for this Chemical
About Chemical Synonyms
(E)-Mevinphos breakdown product , (Z)-Mevinphos breakdown product , 813-78-5 (CAS number) , 813785 (CAS number without hyphens) , Amidithion breakdown product , Anilofos breakdown product , Azamethiphos breakdown product , Azinphos-methyl breakdown product , Azinphos-methyl oxygen analog breakdown product , Azothoate breakdown product , Bomyl breakdown product , Bromophos breakdown product , Chlorpyrifos-methyl breakdown product , Chlorthion breakdown product , cis-Azodrin breakdown product , cis-Methocrotophos breakdown product , Crotoxyphos breakdown product , Cyanophos breakdown product , Cythioate breakdown product , DDVP breakdown product , Demephion-O breakdown product , Demephion-S breakdown product , Demeton-O-methyl breakdown product , Demeton-S-methyl breakdown product , Dicrotophos breakdown product , Dimethoate breakdown product , Dimethoate-ethyl breakdown product , Dimethyl hydrogen phosphate , Dimethyl phosphate , Dimethyl phosphoric acid , Dimethylphosphate , DMCP breakdown product , Endothion breakdown product , Etrimfos breakdown product , Famphur breakdown product , Famphur, O-analog breakdown product , Fenitrothion breakdown product , Fenthion breakdown product , Fenthion oxon breakdown product , Formothion breakdown product , Fosmethilan breakdown product , Fospirate breakdown product , Heptenophos breakdown product , Iodofenfos breakdown product , Isazophos-methyl breakdown product , Isochlorthion breakdown product , Isothioate breakdown product , Lythidathion breakdown product , Malaoxon breakdown product , Malathion breakdown product , Menazon breakdown product , Methacrifos breakdown product , Methidathion breakdown product , Methidathion OA breakdown product , Methyl paraoxon breakdown product , Methyl parathion breakdown product , Methyl phenkapton breakdown product , Methyl trithion breakdown product , Mevinphos breakdown product , Monocrotophos breakdown product , Morphothion breakdown product , Naled breakdown product , O,O,S-Trimethyl phosphorodithiate breakdown product , O,O-dimethyl hydrogen phosphate , O,O-dimethyl phosphate , Omethoate breakdown product , Oxydemeton-methyl breakdown product , Phenthoate breakdown product , Phosmet breakdown product , Phosmetoxon breakdown product , Phosnichlor breakdown product , Phosphamidon breakdown product , Phoxim-methyl breakdown product , Pirimiphos-methyl breakdown product , Quinalphos-methyl breakdown product , Ronnel breakdown product , Sophamide breakdown product , Temephos breakdown product , Temephos sulfoxide breakdown product , Tetrachlorvinphos breakdown product , Thiometon breakdown product , Tolclofos-methyl breakdown product , Vamidothion breakdown product
Products Containing This Chemical
Current and historic U.S. registered products
View U.S. Products All Products Currently Registered Products

Signs and Symptoms of Dimethyl phosphate 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.

Sorry! No symptoms for this chemical or chemical group are available. See related chemicals for possible additional information.


Toxicity Information for Dimethyl phosphate

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

Summary Toxicity Information

PAN Bad Actor
Carcinogen Cholinesterase
Water Contaminant
Developmental or
Reproductive Toxin
Not Listed
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
Dimethyl phosphate
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
Not Listed
Not Listed
Not Available
No Consensus Value
No NTP Studies

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
Dimethyl phosphate
IARC Carcinogens
U.S. NTP Carcinogens
California Prop 65 Known Carcinogens
U.S. EPA Carcinogens
TRI Carcinogen
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Endocrine Disruption
Dimethyl phosphate
Illinois EPA list
Keith list
Colborn list
Benbrook list
Danish Inert list
EU list
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Not Listed
Reproductive and Developmental Toxicity
Dimethyl phosphate
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
Not Listed
Not Listed
Not Listed
Not Listed
Chemicals of Special Concern
Dimethyl phosphate
PAN Bad Actors
PAN Dirty Dozen list
Not Listed
Not Listed

Water Pollution Potential and Criteria for Dimethyl phosphate

Water Pollution Potential

PAN Ground Water Contaminant Rating Insufficient Data

Sorry, no water quality standards or criteria have been established for this chemical by the U.S. or Canadian governments; however, there may be criteria established for related chemicals.


Regulatory Information for Dimethyl phosphate

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
Not Listed

Not Listed
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 Dimethyl phosphate

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
Fish Mortality
View All Aquatic Ecotoxicity Studies and References
Summary of Acute Toxicity for Organism Group
Organism Group Average Acute Toxicity Acute Toxicity Range
Fish Slightly Toxic Slight Toxicity
View All Acute Summaries

Terrestrial Ecotoxicity

Summary of Acute Toxicity for Organism Group

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

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 Dimethyl phosphate

CAS Number Relation Reason Chemical Name Chem Detail Symptoms California Use Chem Use Type U.S. EPA Reg PAN Bad Actor
813-78-5 Parent P Dimethyl phosphate View View View Breakdown product No Not Listed
756-80-9, 1112-38-5 Related 2 Dimethyldithio phosphate View View View Breakdown product No Not Listed
Related 2 Dimethylthio phosphate View View View Breakdown product No Not Listed
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.

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