Sodium acid pyrophosphate, also known as disodium dihydrogen pyrophosphate or SAPP, is a synthetic chemical compound used as a food additive. It is a white, water-soluble solid that serves as a buffering and chelating agent in various food products.
Sodium acid pyrophosphate is commonly used in the food industry for its various functions, including:
1. Acting as a leavening agent in baking products to help dough rise.

2. Acting as a pH control agent to maintain the acidity or alkalinity of a food product.

3. Preventing discoloration in processed potatoes and controlling the iron content in canned fruits and vegetables.

4. Acting as a sequestrant, binding with metal ions to improve the quality and stability of food products.

5. Enhancing the texture and quality of processed meats and seafood products.
It?s essential to note that the use of food additives, including sodium acid pyrophosphate, is regulated by food safety authorities in different countries to ensure they are safe for consumption within specified limits.