PAN Pesticides Database - Chemicals

Benomyl - 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 Benomyl

Basic Identification Information About This Chemical
Chemical Name: Benomyl
CAS Number: 17804-35-2
U.S. EPA PC Code: 099101
CA DPR Chem Code: 1552
Molecular Weight: 290.321
Use Type: Fungicide
Chem Class: Benzimidazole
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
Outdoor Container Nursery   Landscape   Apples   Commodity Research   Cherries  
View All Crops and Sites
Other Names for this Chemical
About Chemical Synonyms
(US EPA PC Code ) , 099101 (US EPA PC Code Text ) , 1-(N-Butylcarbamoyl)-2-(methoxy-carboxamido)benzimidazole , 1-Butylcarbamoyl-2-benzimidazolecarbamic acid, methyl ester , 1552 (CA DPR Chem Code) ) , 17804-35-2 (CAS number) , 17804352 , 17804352 (CAS number without hyphens) , 192 (PDP Code) , 2-Benzimidazolecarbamic acid, 1-(butylcarbamoyl)-, methyl ester , Arilate , BBC , Bemomyl , Benex , Benlate , Benomil , Benomilo , Benomyl , Benomyl (ANSI) , BENOMYL (CA DPR Chem Code Text ) , Benomyl-1 , Benomyl-2/n-butyl isocyanate , BNM , Carbamic acid, 1-(butylcarbamoyl)-1H-benzimidazol-2-yl-, methyl ester , D-1991 , F 1991 , Fungicide 1991 , Methyl 1-(butylamino)carbonyl-1H-benzimidazol-2-ylcarbamate , Methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate , N-[1-[(Butylamino)carbonyl]-1H-benzimidazol-2-yl]carbamic acid, Methyl ester , T 1991 , Tersan 1991
Products Containing This Chemical
Current and historic U.S. registered products
View U.S. Products All Products Currently Registered Products

Signs and Symptoms of Benomyl 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.

Symptoms of Benomyl 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  

Route of Exposure


First Aid

Inhalation Fresh air rest. Refer for medical attention.
Skin Redness. Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes First rinse with plenty of water for several minutes (remove contact lenses if easily possible) then take to a doctor.
Ingestion Rinse mouth. Refer for medical attention.
Notes for ICSC Information
Symptoms of Benomyl Exposure from Other Sources

- Irritation of the skin and dermal sensitizer.

Source for Symptoms: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 15. March 1999. (EPA R&M)

First Aid for Benomyl Poisoning

No first aid available for this particular chemical. Get medical aid.

Source for First Aid: ()

Treatment for Benomyl Poisoning

See: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA (EPA R&M)


Toxicity Information for Benomyl

  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
Slight Possible No
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
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
U, Unlikely to be Hazardous
Not Listed
Not Available
Slightly Toxic
Not Acutely Toxic

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
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
Illinois EPA list
Keith list
Colborn list
Benbrook list
Danish Inert list
EU list
Not listed
Reproductive and Developmental Toxicity
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
Chemicals of Special Concern
PAN Bad Actors
PAN Dirty Dozen list

Water Pollution Potential and Criteria for Benomyl

Water Pollution Potential

PAN Ground Water Contaminant Rating Insufficient Data
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)

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 Benomyl

International Regulatory Status

UNEP Persistent Organic Pollutant (POP)
UNEP Prior Informed Consent Chemical (PIC)
WHO Obsolete Pesticide

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
In Evaluation

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 Benomyl

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 Growth, Mortality
AquaticPlants Population
Crustaceans Genetics, Histology, Mortality
Fish Mortality
Insects Intoxication, Mortality
Molluscs Intoxication
Phytoplankton Ecosystem Process, Enzyme(s), Physiology, Population
Zooplankton Accumulation, Cell(s), Intoxication, Mortality, Population, Reproduction
~ Un-Assigned Behavior, Mortality, Physiology, Population, Reproduction
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 Toxicity
Crustaceans Not Acutely Toxic Not Acutely Toxic to Slightly Toxic
Fish Slightly Toxic Not Acutely Toxic to Very High Toxicity
Zooplankton Slightly Toxic Slight to High Toxicity
~ Un-Assigned Moderately Toxic Slight to High Toxicity
View All Acute Summaries

Terrestrial Ecotoxicity

Summary of Acute Toxicity for Organism Group
Organism Group Average Acute Toxicity Acute Toxicity Range
HoneybeesModerately ToxicModerately 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 Benomyl

CAS Number Relation Reason Chemical Name Chem Detail Symptoms California Use Chem Use Type U.S. EPA Reg PAN Bad Actor
17804-35-2 Parent P Benomyl View View View Fungicide No Yes
62732-91-6 Related 2 2-EEEBC View View View Fungicide Yes Yes
10605-21-7 Related 2 Carbendazim View View View Fungicide, Breakdown product Yes Not Listed
37574-18-8 Related 1 Carbendazim hydrochloride View View View Fungicide No Not Listed
52316-55-9 Related 1 Carbendazim phosphate View View View Fungicide Yes 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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