Phosphorus Trichloride is a chemical compound with the formula PCl3. It appears as a colorless liquid with a pungent odor and is primarily used in the production of various chemicals, including phosphorus oxychloride and phosphorus pentachloride. This compound is highly reactive and can be hazardous, as it reacts with water to produce hydrochloric acid and phosphorus acid. Due to its properties, Phosphorus Trichloride is handled with care in industrial settings, often requiring protective equipment to ensure safety during its use.