246Trichlorophenol

2,4,6-Trichlorophenol, commonly abbreviated TCP, is an organochlorine phenol with the chemical formula C6H3Cl3O. It is a chlorinated derivative of phenol in which chlorine atoms substitute hydrogen atoms at the 2-, 4-, and 6-positions of the aromatic ring. The compound typically appears as a colorless to pale yellow solid with a distinct odor. It is sparingly soluble in water and more soluble in many organic solvents. It is moderately stable under ambient conditions but decomposes upon heating or exposure to strong oxidizers.

TCP is produced commercially as an intermediate in the synthesis of chlorinated organics, and may also form as a byproduct or contaminant during the chlorination of phenolic materials and in some wood preservation or pesticide manufacturing processes. It has been encountered in industrial effluents and, in some regions, is monitored as part of environmental quality programs.

In industry, TCP has been used as an intermediate in the manufacture of pesticides, dyes, and other chlorinated compounds. Because of its chlorinated nature, it is of environmental concern: it is toxic to aquatic organisms and can persist in soils and sediments. It can present risks to human health through occupational exposure or contaminated water, with potential irritation to skin, eyes, and the respiratory tract. Regulatory frameworks typically require careful handling, containment, and disposal as hazardous waste, along with efforts to minimize emissions and accidental releases.