- 4,7-Methanoisobenzofuran, 1,3,4,5,7,8,8-octachloro-1,3,3a,4,7,7a-hexahydro-1,3,4,5,6,7,10,10-octachloro-4,7-endomethylene-4,7,8,9-tetrahydrophthalan
Crystals. The technical product is a whitish to light-brown crystalline powder with a mild chemical odor.
Registry Numbers and Inventories.
EC Index Number
Very toxic; Dangerous for the Environment
Agricultural Chemical and Pesticide; Tumorigen
Swiss Giftliste 1
Melting point, °C
Vapor pressure, mmHg
1.87 g/cm3 (20 C)
Solubility in water
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.
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
(Non-Specific -- Dry Insecticide) Keep upwind. Avoid bodily contact with the material. (Non-Specific -- Insecticide, Dry, n.o.s.) Keep unnecessary people away; isolate hazard area and deny entry. Small spills: absorb with sand or other noncombustible absorbent material and place into containers for later disposal. Small dry spills: with clean shovel place material into clean, dry container and cover; move containers from spill area. Large spills: dike far ahead of spill for later disposal.
Relatively stable to acids; dehydrochlorination may occur under strong akaline conditions.
(Non-Specific -- Dry Insecticide) Avoid breathing dusts and fumes from burning material. Keep upwind. Avoid bodily contact with the material. Wear full protective clothing including boots, protective gloves, goggles, and wear self-contained breathing apparatus.(Non-Specific -- Dry Insecticide) Use agent suitable for type of surrounding fire. Use water in flooding quantities as fog. Use alcohol foam, carbon dioxide, or dry chemical.
Chlorine is evolved when this material is heated above 410F. Avoid acids, certain metal salts, and catalytically active carriers.
Seizures and tremors have occurred in both poisoned experimental animals and humans. Other CNS effects include headache, dizziness, drowsiness, irritability, and paresthesias of the legs. A dose of 1 ppm, administered daily for 120 days, failed to produce increased developmental abnormalities in mice. 2.5 ppm for 120 days was lethal to 80 percent of the test animals in this species.
Vomiting may occur, especially if a petroleum distillate formulation is ingested.
Although not reported, pulmonary aspiration and lipoid pneumonitis may occur if a petroleum distillate-containing formulation is ingested.
Isobenzan is not irritating to the skin.
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
Remove contaminated clothing and jewelry. Wash the skin, including hair and nails, vigorously; do repeated soap washings. Discard contaminated clothing.
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.
USCG CHRIS Code