Isobenzan

  • Telodrin
  • 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
  • 1,3,4,5,6,7,10,10-Octachloro-4,7-endomethylene-4,7,8,9-tetrahydrophthalan
  • Octachlorohexahydro-4,7-methanoisobenzofuran
  • 1,3,4,5,6,7,8,8-Octachloro-4,7-methylene-3a,4,7,7a-tetrahydroisobenzofuran
Formula
C9H4Cl8O
Structure
Description
Crystals. The technical product is a whitish to light-brown crystalline powder with a mild chemical odor.
Uses
Insecticide.

Registry Numbers and Inventories.
CAS
297-78-9
EC (EINECS/ELINCS)
206-045-4
EC Index Number
602-053-00-0
EC Class
Very toxic; Dangerous for the Environment
RTECS
PC1225000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen
Merck
12,5142
Beilstein/Gmelin
1292346
EPA OPP
58501
Swiss Giftliste 1
G-2203

Properties.
Formula
C9H4Cl8O
Formula mass
411.75
Melting point, °C
120-122
Vapor pressure, mmHg
3E-6
Density
1.87 g/cm3 (20 C)
Solubility in water
insoluble

Hazards and Protection.
Storage
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.
Handling
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.
Protection
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.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
(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.
Stability
Relatively stable to acids; dehydrochlorination may occur under strong akaline conditions.

Fire.
Fire fighting
(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.
Hazards
Chlorine is evolved when this material is heated above 410F. Avoid acids, certain metal salts, and catalytically active carriers.

Health.
Poison_Class
1
Exposure effects
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.
   Ingestion
Vomiting may occur, especially if a petroleum distillate formulation is ingested.
   Inhalation
Although not reported, pulmonary aspiration and lipoid pneumonitis may occur if a petroleum distillate-containing formulation is ingested.
   Skin
Isobenzan is not irritating to the skin.

First aid
 
   Ingestion
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.
   Inhalation
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.
   Skin
Remove contaminated clothing and jewelry. Wash the skin, including hair and nails, vigorously; do repeated soap washings. Discard contaminated clothing.
   Eyes
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.

Transport.
USCG CHRIS Code
IBZ