PROFENOFOS is a pale yellow liquid with garlic-likeodor. ... Profenofos is an organic thiophosphate, an organophosphateinsecticide, an organochlorine insecticide and a member of monochlorobenzenes.It has a role as an EC 22.214.171.124 (acetylcholinesterase) inhibitor, an acaricide and an agrochemical. Profenofos is an organophosphate insecticide. It isa liquid with a pale yellow to amber color and a garlic-like odor. Aninsecticide used on a wide variety of crops to control many pests.