Which carboxylic acid salts are used as preservatives in bread and cheese?

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The carboxylic acid salts used as preservatives in bread and cheese are the sodium and calcium salts of propanoic acid (also known as propionic acid).12

These compounds, referred to as propionates, function as antimycotics to inhibit the growth of molds in these food products. While various organic acids—such as acetic, benzoic, and sorbic acids—are utilized as food additives to prevent spoilage, the specific salts of propanoic acid are the primary choices for maintaining the quality of bread and cheese.1342