What is Sodium Acid Pyrophosphate (SAPP)? The leavening acid, sodium acid pyrophosphate (SAPP) is an important component of double acting baking powder as well as self rising flour. SAPP reacts in stages and is desirable in baking applications for its slow action. Sodium phosphates have many applications in food and for water treatment. For example, sodium phosphates are often used as emulsifiers (as in processed cheese), thickening agents, and leavening agents for baked goods. They are also used to control pH of processed foods.
