Can alcohol be used for food preservation?

Yes, ethyl alcohol (95% grain alcohol) is commonly used in herbal extracts not just as a solvent, but to prevent molds and bacteria from forming. In the case of specific foods, I'm unaware of any, but citric acid, potassium sorbate, salt, sorbic acid and even ascorbic acid (Vitamin C) are used to prevent the re-fermentation of wines, to stop the browning of a recently cut banana or apple.

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