- 1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro- 1,4-endo,endo-5,8-dimethanonaphthalene
Endrin is a white crystalline, odorless solid dissolved in a liquid carrier.
Formerly as insecticide.
Registry Numbers and Inventories.
EC Index Number
Very toxic; Toxic; Dangerous for the Environment
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
1E-6 (25 C)
Odor Threshold Odor threshold 118 ppb
1.7 g/cm3 (20 C)
Solubility in water
Partition coefficient, pKow
Heat of vaporization
Hazards and Protection.
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protective gloves and clothing. Face shield or eye protection in combination with breathing protection if in powder form.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Water spill: If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Endrin has reacted violently with parathion. Avoid contact with strong oxidizers, strong acids, parathion.
Decomposes above 200 C.
Use water to keep fire-exposed containers cool. Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Wear positive pressure breathing apparatus and special protective clothing. Remove and isolate contaminated clothing at the site. Move container from fire area if you can do it without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material.Use dry chemical, foam, carbon dioxide, water spray for solution. Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog, or foam.
Slight; dry powder is not flammable, but commercial solutions contain flammable liquids whose flashpoints may be as low as 80F.
Toxic hydrogen chloride and phosgene may be generated when solution burns. Avoid strong oxidizers, strong acids and parathion.
Toxic hydrogen chloride and phosgene may be generated when solution burns.
NIOSH REL: TWA 0.1 mg/m3 [skin] OSHA PEL: TWA 0.1 mg/m3 [skin] IDLH 2 mg/m3
Respiratory depression, elevated body temperature, and recurrent abnormally low blood pressure have occurred in acute endrin poisoning. Sensory disturbances, excitation with myoclonic jerking, convulsions, tremor, ataxia, agitation, nervousness, and amnesia may occur. Permanent damage may occur following acute exposure. Endrin has been fetotoxic and embryotoxic in several species of experimental animals; other studies have not found teratogenic effects. Endrin is less likely to be transferred to breast milk than other organochlorine insecticides because it is metabolized relatively rapidly. Endrin has altered spermatogenesis in rats.
Nausea, vomiting, and diarrhea may occur following ingestion.
Reduced gas exchange, irritation, and chemical pneumonitis may occur.
Extensive contact results in dermal irritation.
Hypersalivation and deafness may occur. White, foamy froth may emanate from the nose and mouth. Headache may persist for two to four weeks.
Seek medical assistance.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.
I; II; III
USCG CHRIS Code
Std. Transport #