Sodium Bisulfite And Sodium Benzoate As Preservatives

Sodium bisulfite and sodium benzoate are chemical compounds used together as preservatives. Sodium bisulfite is a salt of sulfurous acid, often produced by reacting sulfur dioxide with sodium hydroxide or sodium carbonate. Sodium benzoate is the sodium salt of benzoic acid, typically made by reacting benzoic acid with sodium hydroxide.

These compounds are added to foods to prevent spoilage caused by bacteria, yeasts, and molds, extending shelf life. They are commonly found in acidic foods like pickles, olives, relishes, and some deli salads where they are most effective.

In the US, sodium benzoate is Generally Recognized As Safe (GRAS) by the FDA when used according to good manufacturing practices. Sodium bisulfite is also permitted as a preservative. While generally considered safe at typical levels, some individuals may be sensitive to sulfites, experiencing reactions like hives or asthma symptoms, particularly those with sulfite-sensitive asthma. Regulatory bodies like JECFA and EFSA have evaluated these substances and established guidelines for their use.