Sodium Citrate is a saline like compound and slightly tart in flavour. Sodium citrate is used for flavour or as a preservative and acidity stabiliser. Sodium citrate is employed as a flavouring agent in certain varieties of club soda or soft drinks such with lemon-lime and citrus in them, contributing to their tart tastes. In ice cream sodium citrate prevents the fat molecules from coagulating together to give a smooth even texture.In molecular gastronomy it is used in combination with Sodium Alginate and Calcium Chloride to create spheres, caviar, pearls or ravioli. In the process of achieving spherification some solution may be to acidic, for example passionfruit juice or orange juice.
With the addition of sodium citrate it is possible to better control this acidity, thus reducing the impact the solution on the final product. It is also possible to use sodium citrate to enhance products made from invert sugars, such as glucose and isomalt, which have no real flavour of their own. By adding a small amount it will enrich the flavouring agent added to the sugars. So in items such as wafers adding sodium citrate will add a slight tart flavour.