PAN Pesticides Database - Chemicals

Hexachlorobenzene - 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 Hexachlorobenzene

Basic Identification Information About This Chemical
Chemical Name: Hexachlorobenzene
CAS Number: 118-74-1
U.S. EPA PC Code: 061001
CA DPR Chem Code: 321
Molecular Weight: 284.76
Molecular Structure:
Use Type: Fungicide , Insecticide , Microbiocide
Chem Class: Organochlorine
View Related Chemicals
Additional Resources About This Chemical Class and Use Type
Other Names for this Chemical
About Chemical Synonyms
(US EPA PC Code ) , 061001 (US EPA PC Code Text ) , 118-74-1 (CAS number) , 118741 , 118741 (CAS number without hyphens) , 321 (CA DPR Chem Code) ) , 321 (PDP Code) , Amatin , Anticarie , Benzene, hexachloro- , Bunt-cure , Bunt-no-more , Clopyralid impurity , Co-op Hexa , ENT 1719 , ENT-1719 , Granox, component of (with 014505) , Granox, component of (with 014505) , HCB , Hexachlorobenzene , HEXACHLOROBENZENE (CA DPR Chem Code Text ) , Hexachlorobenzene (HCB) , Julin's carbon chloride , No Bunt , PCNB impurity , Pentachlorophenyl chloride , Perchlorobenzene , Sanocide , Smut-Go , Snieciotox
Products Containing This Chemical
Current and historic U.S. registered products
View U.S. Products All Products Currently Registered Products

Signs and Symptoms of Hexachlorobenzene 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.

Hexachlorobenzene is a Organochlorine compound.

Report a Poisoning

Symptoms of Poisoning with Organochlorine Compounds
Find Products Containing this Chemical

- Hypersensitive to stimulation, sensation of prickling, tingling or creeping on skin.
- Headache, dizziness, nausea, vomiting, incoordination, tremor, mental confusion, hyperexcitable state.
- In severe cases: convulsions, seizures, coma and respiratory depression.

Source for Group Symptoms: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 6.

Treatment for Organochlorine Poisoning

See: Recognition and Management of Pesticide Poisoning, 5th edition, U.S. EPA, Chapter 6, page 58.

Symptoms of Hexachlorobenzene 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 MAY BE ABSORBED! Rinse and then wash skin with water and soap. Refer for medical attention.
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
Depending on the degree of exposure periodic medical examination is indicated. Do NOT take working clothes home. Amatin Anticarie Bunt-cure No Bunt 80 Bunt-no-more (Dow chemicals) Co-op-hexa (Bayer chemicals) Sanocide Snieciotox are trade names.

Toxicity Information for Hexachlorobenzene

  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
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
Ia, Extremely Hazardous
Not Listed
Not Available

Not Acutely Toxic to Slightly 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
2B, Possible
Reasonably Anticipated
B2, Probable
Not Listed
Endocrine Disruption
Illinois EPA list
Keith list
Colborn list
Benbrook list
Danish Inert list
EU list
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
Chemicals of Special Concern
PAN Bad Actors
PAN Dirty Dozen list

Water Pollution Potential and Criteria for Hexachlorobenzene

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) 1.00  
Maximum Contaminant Level Goal (MCLG) 0  
One Day Exposure Health Advisory Level 50.0  
Ten Day Exposure Health Advisory Level 50.0  
Lifetime Exposure Health Advisory Level  
Reference Dose 0.80 (g/kg/day)  
U.S. Drinking Water Equivalent Level 30.0  
Concentration with Lifetime Cancer Risk of 1 in 10,000 2.00  
U.S. National Water Quality Criteria
g/L unless noted  
Fresh Water Quality Criteria Continuous Exposure  
Fresh Water Quality Criteria Maximum Peak  
Salt Water Quality Criteria Continuous Exposure
Salt Water Quality Criteria Max
Human Consumption of Organisms from Water Source 0.0003 Notes: b,c
Human Consumption of Water and Organisms from Water Source 0.0003 Notes: b,c
Taste and Odor Criteria
WHO Water Quality Criteria
Description Occurs in drinking-water at concentrations well below those at which toxic effects may occur
Notes Notes: n
Canadian Water Quality Guidelines for the Protection of Aquatic Life
g/L unless noted  
Fresh Water Guidelines Insufficien Notes: e,f,k
Salt Water Guidelines Insufficien Notes: k
Canadian Water Quality Guidelines for the Protection of Agricultural Water Uses
g/L unless noted  
Irrigation Water Guidelines
Livestock Water Guidelines 0.52 (interi

Regulatory Information for Hexachlorobenzene

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

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 Hexachlorobenzene

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 Accumulation, Mortality
Annelida Accumulation, Growth, Mortality, Physiology, Reproduction
AquaticPlants Accumulation, Enzyme(s)
Crustaceans Accumulation, Histology, Mortality, Physiology
Fish Accumulation, Biochemistry, Development, Enzyme(s), Growth, Histology, Hormone(s), Injury, Mortality, No Effect Coded, Physiology
Insects Accumulation
Molluscs Accumulation, Biochemistry, Enzyme(s), Growth, Morphology, Mortality, Physiology, Reproduction
Phytoplankton Accumulation, Biochemistry, Cell(s), Genetics, Growth, Histology, Physiology, Population
Zooplankton Accumulation, Behavior, Enzyme(s), Growth, Intoxication, Mortality, Physiology, Population, Reproduction
~ Un-Assigned Accumulation
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
Fish Moderately Toxic Slight to Very High 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 Hexachlorobenzene

CAS Number Relation Reason Chemical Name Chem Detail Symptoms California Use Chem Use Type U.S. EPA Reg PAN Bad Actor
118-74-1 Parent P Hexachlorobenzene View View View Microbiocide, Fungicide, Insecticide No Yes
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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