[3] Pentachlorobenzenethiol is a combustible gray solid with an unpleasant odor, practically insoluble in water.

[4] The compound is not well-biodegradable and presumably bioaccumulable and toxic for aquatic organisms.

Pentachlorobenzenethiol is itself a metabolite of hexachlorobenzene and is found in the urine and the excretions of animals receiving hexachlorobenzene.

[5] Pentachlorobenzenethiol has a high potential for long-range transport via air as it is very slowly degraded in atmosphere.

The compound is added to rubber (both natural and synthetic) to facilitate processing (mastication).