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Potassium Benzoate is manufactured primarily for food and beverage use. It is a chemical preservative, which in very low concentrations inhibits the activity of the microorganisms. It is used in carbonated beverages. The shelf life of un-pasteurized cider can be greatly extended by adding potassium benzoate. It is also used as the whistle in many fireworks.
Douglas T. Gjerde; James S. Fritz. Sodium and potassium benzoate and benzoic acid as eluents for ion chromatography. Anal. Chem.1981, 53 (14), 2324-2327.
M.V. Gokhale; A.T. Naik; L.K. Doraiswamy. Gas-solid reactions: an unusual observation in the disproportionation of potassium benzoate to terephthalate. Chemical Engineering Science.1975, 30 1409-1414.