trichlorinated

Trichlorinated is an adjective used in chemistry to describe a compound that contains three chlorine atoms within its structure. It usually refers to a molecule in which three hydrogens have been replaced by chlorine, or to a chemical class where three chlorine substituents are present on a ring or chain. The term is common in naming practices, though IUPAC conventions specify the exact positions of the chlorine atoms (for example, 1,1,1-trichloroethane or 1,2,3-trichlorobenzene).

Common examples include trichloromethane, also called chloroform, which is a simple trichlorinated methane; and various trichloroethanes and trichlorinated aromatics such as 1,2,3-trichlorobenzene. The phrase can describe different structural isomers that share the same overall formula but differ in where the chlorine atoms are attached.

Applications and safety considerations: Many trichlorinated hydrocarbons have historically been used as solvents, intermediates, or in manufacturing processes. However, several are persistent environmental pollutants and pose health hazards. Compounds such as trichloroethylene and certain chlorinated solvents are regulated due to toxicity and potential groundwater contamination. As a result, handling, usage, and disposal of trichlorinated compounds are governed by safety and environmental regulations to minimize exposure and environmental impact.

See also: chlorination, chlorinated hydrocarbons, organochlorines, chlorinated solvents.