Sodium citrate, the sodium salt of citric acid, is a versatile compound used in the food industry. Known for its ability to act as an emulsifier, pH regulator, and preservative, sodium citrate plays a vital role in enhancing the quality and safety of products. It appears as a white, crystalline powder that dissolves easily in water, with a slightly salty, tangy flavor.
In the food industry, sodium citrate is primarily used as a food additive, commonly listed as E331. One of its key functions is as an acidity regulator, helping to maintain or modify the pH of foods, particularly in products like soft drinks, jams, and processed cheese. In processed cheese, sodium citrate is used as an emulsifier, preventing the fats and proteins from separating during heating. This allows for the smooth, creamy texture characteristic of products like nacho cheese, cheese sauces, and certain spreads.
Sodium citrate’s role as an emulsifier and buffer extends to a wide variety of products, from ice creams to candies, where it ensures a uniform texture and enhances flavor stability. In beverages, especially carbonated soft drinks, it contributes to a balanced acidity, creating the familiar refreshing taste that consumers enjoy.