Formula C7H5Cl3 Melting point -5 °C | Boiling point 220.8 °C Density 1.38 g/cm³ Appearance Clear liquid | |
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Benzotrichloride, also known as trichlorotoluene is an organic compound with the formula C6H5CCl3. It is principally used as an intermediate in the preparation of other chemical products such as dyes.
Contents
It is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities.
Preparation
Benzotrichloride is produced by the free radical chlorination of toluene, catalysed by light or radical initiators such as dibenzoyl peroxide. Two intermediates are observed:
Uses
Benzotrichloride is partially hydrolysed to benzoyl chloride:
C6H5CCl3 + H2O → C6H5C(O)Cl + 2 HClIt is also transformed into benzotrifluoride, a precursor to pesticides:
C6H5CCl3 + 3 KF → C6H5CF3 + 3 KCl
