Phosphorus Trichloride is a phoshponium compound for treating gastrointestinal hyperacidity and ulceration. A functional group of soil urease inhibitor nBPT. Also a substance for the studies on process for preparation of sodium alendronate which can be used as a therapeutic agent for osteoporosis and osteoarthritis. Molecular Formula: Cl3P Molecular Weight: 137.33000000000001