Trichlorobenzene Explained

Trichlorobenzene (TCB) may refer to any of three chlorobenzenes with the molecular formula C₆H₃Cl₃.^[1] 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. 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.^{[2] [3]}

Identification numbers and regulations

• 1,2,3-Trichlorobenzene - EC number 201-757-1, CAS number 87-61-6, substance subjected to REACH Registration,^[4] added to the list of Submitted SVHC Intentions List^[5]
• 1,2,4-Trichlorobenzene^[6] - 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.

See also

• Tribromobenzene

Notes and References

1. Book: Trichlorobenzene (all isomers). 332–363. onlinelibrary.wiley.com. 10.1002/3527600418.mb1200248isme0003. Trichlorobenzene (all isomers) [MAK Value Documentation, 1992]. 2012. 978-3-527-60041-0.
2. Web site: Trichlorobenzenes. atsdr.cdc.gov. 8 June 2017.
3. Encyclopedia: U. Beck . E. Löser . Ullmann's Encyclopedia of Industrial Chemistry. 2012. Wiley-VCH. Weinheim. 10.1002/14356007.o06_o03. 978-3-527-30673-2. Chlorinated Benzenes and Other Nucleus-Chlorinated Aromatic Hydrocarbons.
4. [Registration, Evaluation, Authorisation and Restriction of Chemicals|REACH Registration]
5. https://watchdog.ecomole.com/lists.html#submitted_intentions Submitted SVHC Intentions List
6. Web site: 1,2,4-Trichlorobenzene. Sigma Aldrich. sigmaaldrich.com. 8 June 2017.