Tags: Chemical Compound, Chemical Substance.
Phosphorus trifluoride (formula PF3) is a colorless and odorless gas. It is highly toxic and reacts slowly with water. Its main use is as a ligand in metal complexes. As a ligand it parallels carbon monoxide in metal carbonyls and indeed its toxicity is due to its binding with the iron in blood hemoglobin in a similar way to carbon monoxide.
