1,2,3-Trichlorobenzene is an organochlorine compound with the chemical formula C6H3Cl3.

Small amounts of 1,2,3-trichlorobenzene can also be produced while chlorinating benzene with iron(III) chloride as a catalyst.

[3] The compound forms white crystals with a faint aromatic odor.

[5] The substance is irritating to eyes and the respiratory tract.

[5][6] Also as a solvent for high-melting products, as a coolant in electrical installations and glass tempering.