Function: pH adjuster/stabilizer, chelating agent, antioxidant, preservative
Sodium citrate is primarily used to control the pH of a product. It is a citric acid salt that can be derived from citrus fruits. Due to its connection with citric acid, it also has mild antioxidant and preservative properties.
Sodium citrate is also a chelating agent, which means it prevents metals in the water from binding to other ingredients and impacting their effectiveness.