Phosphorus pentachloride

Phosphorus pentachloride is a greenish-yellow crystalline solid with an irritating odor. It is decomposed by water to form hydrochloric and phosphoric acid and heat. This heat may be sufficient to ignite surrounding combustible material. It is corrosive to metals and tissue. Long term exposure to low concentrations or short term exposure to high concentrations can result in adverse health effects from inhalation.

在有机合成中用作氯化剂，催化剂。是生产医药、染料、化学纤维的原料，也是生产氯化磷腈、磷酰氯的原料。五氯化磷主要用作醇、羧酸、酰胺、醛酮、烯醇的氯代化试剂以及Beckmann重排试剂