Phosphorus pentoxide is a potent dehydrating agent as indicated by the exothermic nature of its hydrolysis P4O10 + 6 H2O → 4 H3PO4 (–177 kJ). A granular form of P4O10 is used in desiccators. Consistent with its strong desiccating power, P4O10 is used in organic synthesis for dehydration.

Application

Phosphorus pentoxide is a deliquescent compound prepared by reacting phosphorus with air. It is a commonly used as dehydrating and condensing agent in organic synthesis.