PAN Pesticides Database - Chemicals

Methiocarb - 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 Methiocarb

Basic Identification Information About This Chemical
Chemical Name: Methiocarb
CAS Number: 2032-65-7
U.S. EPA PC Code: 100501
CA DPR Chem Code: 375
Molecular Weight: 225.31
Molecular Structure:
Use Type: Insecticide , Molluscicide
Chem Class: N-Methyl Carbamate
View Related Chemicals
 
Additional Resources About This Chemical Class and Use Type

See the Global Pesticide Resources page for many additional links.

Historical Use of this Chemical
Top five crops and sites for this pesticide in California
Outdoor Container Nursery   Greenhouse Plants   Outdoor Flower Nursery   Greenhouse Flowers   Lemons  
View All Crops and Sites
 
Other Names for this Chemical
About Chemical Synonyms
00375 (CA DPR Chem Code Text) , 00375 (CA DPR Chem Code) , 100501 (US EPA PC Code Text) , 100501 (US EPA PC Code) , 195 (PDP Code) , 2032-65-7 (CAS number) , 2032657 , 2032657 (CAS number without hyphens) , 3,5-Dimethyl-4-(methylthio)phenyl methylcarbamate , 375 (CA DPR Chem Code) , 375 (CA DPR Chem Code) , 4-(Methylthio)-3,5-xylyl methylcarbamate , Bay 37344 , Carbamic acid, methyl-, 4-(methylthio)-3,5-xylyl ester , Draza , ENT-25726 , H 321 , Mercaptodimethur , Merkaptodimetur , Mesurol , Methiocarb , Methiocarb , Methiocarb (Mesurol) , Metiocarbe , Metmercapturon , Phenol, 3,5-dimethyl-4-(methylthio)-, methylcarbamate
 
Products Containing This Chemical
Current and historic U.S. registered products
View U.S. Products All Products Currently Registered Products
 

Signs and Symptoms of Methiocarb 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.

Methiocarb is a high toxicity Carbamate compound.

Report a Poisoning

Symptoms of Poisoning with high toxicity Carbamate Compounds
Find Products Containing this Chemical

High Toxicity Carbamate Pesticides:
- Malaise, muscle weakness, dizziness, and sweating.
- Headache, salivation, nausea, vomiting, abdominal pain, and diarrhea.
- Miosis with blurred vision, incoordination, muscle twitching and slurred speech.
- In more severe cases: Central nervous system depression (coma, seizures and hypotonicity), hypertension and cardiorespiratory depression. Also dyspnea, bronchospasms and bronchorrhea with eventual pulmonary edema.

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

Treatment for high toxicity Carbamate Poisoning

See: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 5, page 50.

 
 

Toxicity Information for Methiocarb

  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
Unclassifiable
Potential
 
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.

Additional Resources about the Toxicity of this Chemical

See the Global Pesticide Resources page for many additional links.

Detailed Toxicity Information

Acute Toxicity 2
Methiocarb
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
Ib, Highly Hazardous
Not Listed
Highly Toxic
Highly Toxic
No NTP Studies

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
Methiocarb
IARC Carcinogens
U.S. NTP Carcinogens
California Prop 65 Known Carcinogens
U.S. EPA Carcinogens
TRI Carcinogen
Not Listed
Not Listed
Not Listed
D, Unclassifiable, insufficient data
Not Listed
 
Endocrine Disruption
Methiocarb
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
Methiocarb
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
Methiocarb
PAN Bad Actors
PAN Dirty Dozen list
Yes
Not Listed
 

Water Pollution Potential and Criteria for Methiocarb

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)
27.0
655.0
24.0
64.0
64.0
 
 

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 Methiocarb

International Regulatory Status

Registration in Selected Countries Registration in Selected Countries:
Methiocarb

 
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 Methiocarb

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 Mortality
Crustaceans Behavior, Mortality
Echinoderms Development
Fish Mortality
Insects Growth, Intoxication, Mortality
Molluscs Development, Morphology, Mortality
Phytoplankton Physiology, Population
Zooplankton Intoxication, Mortality
~ Un-Assigned Mortality, Population
View All Aquatic Ecotoxicity Studies and References
 
Summary of Acute Toxicity for Organism Group
Organism Group Average Acute Toxicity Acute Toxicity Range
Amphibians Moderately Toxic Moderate Toxicity
Crustaceans Moderately Toxic Moderate Toxicity
Fish Highly Toxic Moderate to High Toxicity
Insects Highly Toxic Highly Toxic
Molluscs Moderately Toxic Slight to High Toxicity
Zooplankton Highly Toxic Highly Toxic
~ Un-Assigned Very Highly Toxic Very 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 Methiocarb

CAS Number Relation Reason Chemical Name Chem Detail Registration Symptoms California Use Chem Use Type U.S. EPA Reg PAN Bad Actor
2032-65-7 Parent P Methiocarb View View View View Insecticide, Molluscicide Yes Yes
2179-25-1 Related 5a Methiocarb sulfone View View View View Breakdown product No Yes
2635-10-1 Related 5a Methiocarb sulfoxide View View View View 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.

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