Trichlorobenzene (TCB) may refer to any of three

isomer In chemistry, isomers are molecules or polyatomic ions with identical molecular formulae – that is, same number of atoms of each element – but distinct arrangements of atoms in space. Isomerism is existence or possibility of isomers. Iso ...

chlorinated In chemistry, halogenation is a chemical reaction that entails the introduction of one or more halogens into a compound. Halide-containing compounds are pervasive, making this type of transformation important, e.g. in the production of polyme ...

derivatives of

benzene Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms, ...

with the molecular formula C₆H₃Cl₃. Trichlorobenzenes are man-made chemical compounds that occur in three different forms. Even though the forms have the same molecular weight and molecular formulae, they are structurally different by the positions of the chlorine atoms attached to the

benzene ring Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atoms, ...

. 1,2,3-Trichlorobenzene and 1,3,5-trichlorobenzene are colorless solids, but 1,2,4-trichlorobenzene is a colorless oil. The isomers may also have different chemical and toxicological properties.

Identification numbers and regulations

1,2,3-Trichlorobenzene Onekama ( ) is a village in Manistee County in the U.S. state of Michigan. The population was 411 at the 2010 census. The village is located on the shores of Portage Lake and is surrounded by Onekama Township. The town's name is derived from "On ...

- EC number 201-757-1, CAS number 87-61-6, substance subjected to REACH Registration, added to the list of
Submitted SVHC Intentions List
* 1,2,4-Trichlorobenzene - EC number 204-428-0, CAS number 120-82-1, substance subjected to REACH Registration, on 2 Aug 2010. added to the list of Submitted SVHC Intentions List on 2 Aug 2010. * 1,3,5-Trichlorobenzene - EC number 203-608-6, CAS 108-70-3, added to the list of Submitted SVHC Intentions List on 2 Aug 2010.

References

{{Reflist Chlorobenzenes