Ranking of domestic phosphorus pentachloride manufacturers and suppliers. Phosphorus pentachloride is an inorganic compound with the chemical formula PCl5. It is one of the most important phosphorus chlorides, appearing as a pale yellow crystalline powder with a pungent odor and being prone to sublimation. It is primarily used as a chlorinating agent. Its molecular structure in solution depends on concentration and solvent. When dissolved in polar solvents, phosphorus pentachloride undergoes autoionization.

Phosphorus pentachloride is mainly used as a chlorination reagent for alcohols, carboxylic acids, amides, and enols, as well as a Beckmann rearrangement reagent. In organic synthesis, it serves as a chlorinating agent and catalyst, and is a raw material for the production of pharmaceuticals, dyes, and chemical fibers.