Phosphorus trichloride structure
The bottle on the right has phosphorus trichloride in it.
Phosphorus trichloride is a chemical compound. It contains phosphorus and chloride ions. It contains phosphorus in its +3 oxidation state. Its chemical formula is PCl3.
It is a colorless liquid. It reacts with water to make phosphorous acid and hydrochloric acid. It is very toxic. It is a weak reducing agent.
It is made by reacting extra phosphorus with chlorine. It is used to make phosphorous acid industrially (in factories).
It is used to make organic compounds. It is also used to make other phosphorus compounds.