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Trichlorobenzene (TCB) may refer to any of three isomeric chlorinated derivatives of benzene with the molecular formula C 6 H 3 Cl 3. They differ by the positions of the chlorine atoms around the ring:
1,3,5-Trichlorobenzene is an organochlorine compound. It is one of the three isomers of trichlorobenzene . Being more symmetrical than the other isomers, it exists as colourless crystals whereas the other isomers are liquids at room temperature.
1,2,3-Trichlorobenzene is an organochlorine compound with the chemical formula C 6 H 3 Cl 3. [ 1 ] [ 2 ] This is one of three isomers of trichlorobenzene ; the two others are 1,2,4-Trichlorobenzene and 1,3,5-Trichlorobenzene .
The LD50 (oral, rats) is 756 mg/kg. Animal studies have shown that 1,2,4-trichlorobenzene affects the liver and kidney, and is possibly a teratogen. [4] There is no regulated occupational exposure limit for chemical exposure, but the National Institute for Occupational Safety and Health recommends no greater exposure than 5 ppm, over an 8-hour workday.
The 2,4,6- isomer is easily produced by deprotonation of 1,3,5-trichlorobenzene followed by reaction with carbon dioxide. [1] Its conversion to 2,4,6-trichlorobenzoyl chloride makes it a key intermediate in the Yamaguchi esterification protocol.
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The major use of chlorobenzene is as a precursor for further intermediates such as nitrophenols, nitroanisole, chloroaniline, and phenylenediamines, which are used in the production of herbicides, dyestuffs, chemicals for rubber, and pharmaceuticals.
SALT LAKE CITY (AP) — Former Utah House speaker and U.S. Senate candidate Brad Wilson is the new CEO of the Utah Olympic organizing committee. The group, which is hosting the Winter Games in ...