[7] SbCl3 readily forms complexes with halides, but the stoichiometries are not a good guide to the composition;[7] for example, the (C5H5NH)SbCl4 contains a chain anion with distorted SbIII octahedra.

[8] With nitrogen donor ligands, L, complexes with a stereochemically active lone-pair are formed, for example Ψ-trigonal bipyramidal LSbCl3 and Ψ-octahedral L2SbCl3.

The antimony trichloride reacts with the carotenoid to form a blue complex that can be measured by colorimetry.

It is also used as a catalyst for polymerization, hydrocracking, and chlorination reactions; as a mordant; and in the production of other antimony salts.

[12] In episode 2 of the third season of the popular British program All Creatures Great and Small (adapted from chapter six of the book All Things Wise and Wonderful), several calves died at Kate Billings farm following an episode of nonspecific gastroenteritis, the cause of which was later determined to be ingestion of antimony trichloride present in a topical "butter of antimony" solution painted on to cauterize and remove their horn buds.