Endrin
An organochlorine compound resulting from the epoxidation of the double bond of isodrin. It is the endo, endo stereoisomer of dieldrin. It is an insecticide mainly used on field crops such as cotton and grains and has also been used as a rodenticide to control mice and voles. The product is banned in many countries since it is a persistent organic pollutant. — ChEBI
Safety documents & references
2 indexed referencesFind a product-specific SDS
Safety guides and government classification records are not a manufacturer’s SDS. Match supplier, product number, concentration, physical form, region and revision before using a document.
Identity & molecular properties
Source-linked values| CAS number | 72-20-8 | ChEBI ↗ |
| Molecular formula | C12H8Cl6O | ChEBI ↗ |
| Molar mass | 380.913 g/mol | ChEBI ↗ |
| Monoisotopic mass | 377.87063 Da | ChEBI ↗ |
| Formal charge | 0 | ChEBI ↗ |
| ChEBI identifier | CHEBI:81526 | ChEBI ↗ |
Cross-source molecular data
PubChem| Molar mass | 380.9 g/mol | PubChem ↗ |
| Exact mass | 379.867681 Da | PubChem ↗ |
| Computed XLogP | 3.7 | PubChem ↗ |
| Topological polar surface area (Ų) | 12.5 | PubChem ↗ |
| H-bond donors | 0 | PubChem ↗ |
| H-bond acceptors | 1 | PubChem ↗ |
| Rotatable bonds | 0 | PubChem ↗ |
PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.
Names & structural identifiers
Copy any identifierendrinrel-(1aR,2R,2aR,3R,6S,6aS,7S,7aS)-3,4,5,6,9,9-hexachloro-1a,2,2a,3,6,6a,7,7a-octahydro-2,7:3,6-dimethanonaphtho[2,3-b]oxireneDFBKLUNHFCTMDC-GKRDHZSOSA-N[H][C@]12C[C@]([H])([C@]3([H])O[C@]13[H])[C@@]1([H])[C@]2([H])[C@@]2(Cl)C(Cl)=C(Cl)[C@]1(Cl)C2(Cl)ClInChI=1S/C12H8Cl6O/c13-8-9(14)11(16)5-3-1-2(6-7(3)19-6)4(5)10(8,15)12(11,17)18/h2-7H,1H2/t2-,3+,4-,5+,6-,7+,10-,11+Names & synonyms
Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.
Classification & relationships
ChEBI ontologyRoles recorded in ChEBI
Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.
Safety classification · Japan
NITE / Japanese government1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-endo-1,4-endo-5,8-dimethanonaphthalene; endrin · R02-B-045-MHLW, MOE
| Endpoint | Reported classification |
|---|---|
| Self-reactive substances and mixtures | Type G |
| Acute toxicity （Oral） | Category 1 |
| Acute toxicity （Dermal） | Category 1 |
| Specific target organ toxicity - Single exposure | Category 1 (nervous system, liver, kidney) |
| Specific target organ toxicity - Repeated exposure | Category 1 (nervous system, liver) |
| Hazardous to the aquatic environment （Acute） | Category 1 |
Selected source-reported endpoints. Other endpoints, rationales and conditions remain in the original classification. Missing or unlisted information does not mean non-hazardous. This is not a global classification or transport decision.
Read the original NITE classificationMass ↔ amount of substance
Calculated from sourced massUses 380.913 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.
Elemental composition
Theoretical mass fractionsClCOHCalculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.
Research & patent references
Selected source associationsSources & record history
Checked 27 Sep 2026Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0
PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.