In the cosmetics industry, sodium benzoate can be found in face and body washes, lotions, creams, cleansing products, hair care products, eye creams, baby creams, and oral hygiene products. Sodium benzoate is a preservative in some over-the-counter and prescription medications, especially liquid medications such as cough syrup.
Sodium benzoate can also act as a lubricant in tablet manufacturing and makes tablets transparent and flexible, allowing them to dissolve quickly when swallowed. Larger amounts of sodium benzoate are prescribed to treat elevated levels of ammonia in the blood. A new application is the formulation of sodium benzoate in plastics, such as polypropylene, to improve strength and transparency.