Record Information
Version1.0
Creation Date2009-03-06 18:57:57 UTC
Update Date2026-03-27 02:04:51 UTC
Accession NumberCHEM000030
Identification
Common NameHeptachlor
ClassSmall Molecule
DescriptionHeptachlor is a manufactured cyclodiene organochlorine insecticide. As it is a persistant organic pollutant, heptachlor use is banned or limited in most areas. It is one ingredient of cigarette. (4, 5)
Contaminant Sources
  • Clean Air Act Chemicals
  • HPV EPA Chemicals
  • IARC Carcinogens Group 2B
  • My Exposome Chemicals
  • STOFF IDENT Compounds
  • T3DB toxins
  • Tobacco Smoke Compounds
  • ToxCast & Tox21 Chemicals
Contaminant Type
  • Cigarette Toxin
  • Organic Compound
  • Organochloride
  • Pesticide
  • Pollutant
  • Synthetic Compound
Chemical Structure
Thumb
Synonyms
ValueSource
1,4,5,6,7,8,8-Heptachloro-3a,4,7,7a-tetrahydro-4,7-methano-1H-indeneChEBI
1,5,7,8,9,10,10-Heptachlorotricyclo[5.2.1.0(2,6)]deca-3,8-dieneChEBI
3-ChlorochlordeneChEBI
HeptachloraneChEBI
HeptamulChEBI
Chemical FormulaC10H5Cl7
Average Molecular Mass373.318 g/mol
Monoisotopic Mass369.821 g/mol
CAS Registry Number76-44-8
IUPAC Name1,5,7,8,9,10,10-heptachlorotricyclo[5.2.1.0²,⁶]deca-3,8-diene
Traditional Nameheptachlor
SMILESClC1C=CC2C1C1(Cl)C(Cl)=C(Cl)C2(Cl)C1(Cl)Cl
InChI IdentifierInChI=1S/C10H5Cl7/c11-4-2-1-3-5(4)9(15)7(13)6(12)8(3,14)10(9,16)17/h1-5H
InChI KeyFRCCEHPWNOQAEU-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as vinyl chlorides. These are vinyl halides in which a chlorine atom is bonded to an sp2-hybridised carbon atom.
KingdomOrganic compounds
Super ClassOrganohalogen compounds
ClassVinyl halides
Sub ClassVinyl chlorides
Direct ParentVinyl chlorides
Alternative Parents
Substituents
  • Chloroalkene
  • Haloalkene
  • Vinyl chloride
  • Hydrocarbon derivative
  • Organochloride
  • Alkyl halide
  • Alkyl chloride
  • Aliphatic homopolycyclic compound
Molecular FrameworkAliphatic homopolycyclic compounds
External Descriptors
Biological Properties
StatusDetected and Not Quantified
OriginExogenous
Cellular Locations
  • Membrane
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
Applications
Biological Roles
Chemical Roles
Physical Properties
StateSolid
AppearanceWhite or tan powder.
Experimental Properties
PropertyValue
Melting Point95.5°C
Boiling Point135-145°C at 1-1.5 mmHg
Solubility0.00018 mg/mL at 25 °C [BIGGAR,JW & RIGGS,RI (1974)]
Predicted Properties
PropertyValueSource
Water Solubility0.00013 g/LALOGPS
logP5.83ALOGPS
logP4.78ChemAxon
logS-6.4ALOGPS
Physiological Charge0ChemAxon
Hydrogen Acceptor Count0ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area0 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity76.93 m³·mol⁻¹ChemAxon
Polarizability29.8 ųChemAxon
Number of Rings3ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0uds-4049000000-c51d741746da649686d9Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-00di-0009000000-a9589fd832fad50629acSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00di-0019000000-15049c753001bc13ed7dSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-000t-1098000000-839f421f43d7d8de30faSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-014i-0009000000-2bd310b28b3709b65f28Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0159-0009000000-d5a7fe4201fe3513e615Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-001j-1059000000-f5ad26dd40c4a2b07f59Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-00di-0009000000-af65d971ec7702fadf45Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00di-0009000000-af65d971ec7702fadf45Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-00di-0009000000-82bce37062404ee24136Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-014i-0009000000-abb89a0ef7eebdab3a36Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-014i-0009000000-abb89a0ef7eebdab3a36Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-014i-3009000000-cdb75b4e54e455a9ec4dSpectrum
MSMass Spectrum (Electron Ionization)splash10-0fk9-5891000000-440b76d361a75a086f4cSpectrum
Toxicity Profile
Route of ExposureOral (3) ; inhalation (3) ; dermal (3)
Mechanism of ToxicityHeptachlor is a central nervous system stimulant. It non-competitively blocks neurotransmitter action at gamma-amino butyric acid receptors, resulting in overstimulation of the nervous system. Heptachlor is also believed to exert carcinogenic effects by activating key kinases in signalling pathways and inhibiting apoptosis. (4, 1, 2)
MetabolismHeptachlor is readily absorbed by the skin, lungs and gastrointestinal tract. It is readily metabolized by liver microsomes into heptachlor epoxide, its most persistent and toxic metabolite, which is mainly stored in adipose tissue. Heptachlor epoxide is excreted in the urine and faeces. (4)
Toxicity ValuesLC50: 150 mg/kg over 4 hours (Inhalation, Cat) (8) LD50: 500-2000 mg/kg (Dermal, Rabbit) (8) LD50: 80-90 mg/kg (Oral, Rabbit) (8) LD50: 27 mg/kg (Intraperitoneal, Rat) (8)
Lethal DoseNot Available
Carcinogenicity (IARC Classification)2B, possibly carcinogenic to humans. (7)
Uses/SourcesHeptachlor was originally widely produced as an insecticide, but is now used only in fire and control in underground transformers. (4)
Minimum Risk LevelAcute Oral: 0.0006 mg/kg/day (6) Intermediate Oral: 0.0001 mg/kg/day (6)
Health EffectsExposure to heptachlor may cause damage to your liver, nervous system, and immune system. (4)
SymptomsHeptachlor poisoning may cause convulsions, vomiting, seizures, confusion, incoordination, excitability, coma, hypotension, and respiratory failure. (4)
TreatmentTreatment is symptomatic and is aimed at controlling convulsions, coma, and respiratory depression. (4)
Concentrations
Not Available
DrugBank IDNot Available
HMDB IDNot Available
FooDB IDNot Available
Phenol Explorer IDNot Available
KNApSAcK IDNot Available
BiGG IDNot Available
BioCyc IDNot Available
METLIN IDNot Available
PDB IDNot Available
Wikipedia LinkHeptachlor
Chemspider IDNot Available
ChEBI ID34785
PubChem Compound ID3589
Kegg Compound IDC14185
YMDB IDNot Available
ECMDB IDNot Available
References
Synthesis ReferenceNot Available
MSDSNot Available
General References
1. https://www.ncbi.nlm.nih.gov/pubmed/?term=24177859
2. https://www.ncbi.nlm.nih.gov/pubmed/?term=24577234