PAN Pesticides Database - Chemicals

2,4-dichlorophenol - 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 2,4-dichlorophenol

Basic Identification Information About This Chemical
Chemical Name: 2,4-dichlorophenol
CAS Number: 120-83-2
U.S. EPA PC Code: 651505
CA DPR Chem Code: 2499
Molecular Weight: 163
Use Type:
Chem Class: Chlorinated Phenol
View Related Chemicals
Additional Resources About This Chemical Class and Use Type
Other Names for this Chemical
About Chemical Synonyms
02499 (CA DPR Chem Code Text ) , 120-83-2 (CAS number) , 120832 (CAS number without hyphens) , 2,4-dichlorophenol , 2499 (CA DPR Chem Code) ) , 24dichlorophenol , 651505 [US EPA PC Code, Numeric ] , 651505 [US EPA PC Code, Text ]
Products Containing This Chemical
Current and historic U.S. registered products
View U.S. Products All Products Currently Registered Products

Signs and Symptoms of 2,4-dichlorophenol 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.

2,4-dichlorophenol is a Phenol or Cresol compound.

Report a Poisoning

Symptoms of Poisoning with Phenol or Cresol Compounds
Find Products Containing this Chemical

- Highly corrosive.
- Caustic eye, skin, mouth and gastrointestinal injuries.
- Nausea, vomiting, and diarrhea.
- Hypotension, myocardial failure, pulmonary edema, neurological changes, liver and renal toxicity, methemoglobinemia and hemolysis.

Source for Group Symptoms: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 19.

Treatment for Phenol or Cresol Poisoning

See: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 19, page 203.

Symptoms of 2,4-dichlorophenol 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 Burning sensation. Cough. Shortness of breath. Sore throat. Fresh air rest. Artificial respiration if indicated. Refer for medical attention.
Skin MAY BE ABSORBED! Redness. Pain. Further see Ingestion. Blisters. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Redness. Pain. Severe deep burns. First rinse with plenty of water for several minutes (remove contact lenses if easily possible) then take to a doctor.
Ingestion Abdominal pain. Burning sensation. Convulsions. Laboured breathing. Shock or collapse. Weakness. Tremor. Rinse mouth. Do NOT induce vomiting. Refer for medical attention.
Notes for ICSC Information
Insufficient data are available on the effect of this substance on human health therefore utmost care must be taken.

Toxicity Information for 2,4-dichlorophenol

  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
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
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
IARC Carcinogens
U.S. NTP Carcinogens
California Prop 65 Known Carcinogens
U.S. EPA Carcinogens
TRI Carcinogen
2B, Possible
Not Listed
Not Listed
Not Listed
Not Listed
Endocrine Disruption
Illinois EPA list
Keith list
Colborn list
Benbrook list
Danish Inert list
EU list
Not Listed
Not Listed
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
Not Listed
Not Listed
Not Listed
Chemicals of Special Concern
PAN Bad Actors
PAN Dirty Dozen list
Not Listed
Not Listed

Water Pollution Potential and Criteria for 2,4-dichlorophenol

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)

Water Standards and Criteria

U.S. National Drinking Water Standards and Health Criteria
g/L unless noted  
Maximum Contaminant Level (MCL) 0  
Maximum Contaminant Level Goal (MCLG)  
One Day Exposure Health Advisory Level 30.0  
Ten Day Exposure Health Advisory Level 30.0  
Lifetime Exposure Health Advisory Level 20.0  
Reference Dose 3.00 (g/kg/day)  
U.S. Drinking Water Equivalent Level 100.0  
Concentration with Lifetime Cancer Risk of 1 in 10,000  
U.S. National Water Quality Criteria
g/L unless noted  
Fresh Water Quality Criteria Continuous Exposure 0  
Fresh Water Quality Criteria Maximum Peak  
Salt Water Quality Criteria Continuous Exposure
Salt Water Quality Criteria Max
Human Consumption of Organisms from Water Source 290.0 Notes: b,u
Human Consumption of Water and Organisms from Water Source 77.0 Notes: b,u
Taste and Odor Criteria 0.30
WHO Water Quality Criteria
Description Available data inadequate to permit derivation of health-based guideline value
Notes Notes: n

Regulatory Information for 2,4-dichlorophenol

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
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Ecotoxicity for 2,4-dichlorophenol

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
Annelida Accumulation, Mortality
AquaticPlants Growth, Mortality, Population, Reproduction
Crustaceans Behavior, Biochemistry, Mortality
Fish Accumulation, Behavior, Biochemistry, Enzyme(s), Growth, Mortality, No Effect Coded, Physiology, Reproduction
Insects Accumulation
Molluscs Enzyme(s), Mortality
NematodesandFlatworms Mortality
Phytoplankton Biochemistry, Growth, Histology, Mortality, Physiology, Population
Zooplankton Behavior, Development, Enzyme(s), Growth, Intoxication, Mortality, Population, Reproduction
~ Un-Assigned Mortality
View All Aquatic Ecotoxicity Studies and References
Summary of Acute Toxicity for Organism Group
Organism Group Average Acute Toxicity Acute Toxicity Range
AquaticPlants Slightly Toxic Slight Toxicity
Fish Moderately Toxic Moderate Toxicity
Zooplankton Moderately Toxic Slight to Moderate 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
Organism Group Chronic Toxicity  

Related Chemicals for 2,4-dichlorophenol

CAS Number Relation Reason Chemical Name Chem Detail Symptoms California Use Chem Use Type U.S. EPA Reg PAN Bad Actor
120-83-2 Parent P 2,4-dichlorophenol View View View No Not Listed
Related 1 Sodium dichlorophenate View View View Fungicide, Microbiocide No Not Listed
Working with the Information on this Page

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* 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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