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Zinc Benzoate is an organic metal salt in a white powder form. It is very slightly soluble in water. Zinc Benzoate is commonly used in food and feed additives as a preservative and source of zinc. It is an antiseptic, anti-animalcule, and anti-freezing agent used in food, medicine, tobacco, plating, printing, and dyeing.

Zinc benzoate, which inhibits MAO-A activity, is easily incorporated in deionized and distilled water by boiling polystyrene and may also be a contaminating environmental chemical compound that alters the levels of serotonin and norepinephrine in the central nervous system[1].

[1] Toru Egashira . “Zinc benzoate, a contaminating environmental compound derived from polystyrene resin inhibits A-type monoamine oxidase.” Toxicology letters 145 2 (2003): Pages 161-165.