Trichlorobenzene

Trichlorobenzene is a group of three isomeric chemical compounds. It refers to the three possible replacements of three of the hydrogen atoms in a benzene molecule with chlorine atoms. The isomers are 1,2,3-Trichlorobenzene, 1,2,4-Trichlorobenzene, and 1,3,5-Trichlorobenzene.

Chemical Properties

Trichlorobenzene isomers are colorless liquids, although commercial samples can appear yellow. They have a characteristic odor similar to that of chloroform. The boiling points of the isomers range from 214 to 218 °C, and their respective densities range from 1.46 to 1.50 g/cm³.

Production

Trichlorobenzenes are produced by the chlorination of chlorobenzene or dichlorobenzene. The reaction is highly exothermic and is carried out in the presence of a catalyst.

Uses

Trichlorobenzenes are used as a dielectric and heat transfer fluid in transformers and capacitors. They are also used as a solvent for a variety of chemicals and as an insecticide.

Health Effects

Exposure to trichlorobenzene can cause irritation to the eyes, skin, and respiratory tract. It can also cause liver and kidney damage. Long-term exposure can lead to chronic health effects such as cancer.

Environmental Impact

Trichlorobenzene is a persistent organic pollutant. It does not readily degrade in the environment and can accumulate in the food chain, leading to potential health risks for humans and wildlife.

File:Trichlorobenzene.png

Chemical structure of 1,2,4-Trichlorobenzene

See Also

• Chlorobenzene
• Dichlorobenzene
• Persistent organic pollutant

References

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