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Preservatives are a class of food additives that can inhibit microbial activity and prevent food spoilage. To make food have a certain storage period, certain measures must be taken to prevent microbial infection and reproduction. Practice has proved that the use of preservatives is one of the most

Potassium sorbate, also known as potassium 2,4-hexadienoate, is the potassium salt of sorbic acid, and its molecular formula is C6H7O2K. White to light yellow scale-like crystals, crystal particles or crystal powder, odorless or slightly odorous, easy to absorb moisture when exposed to air for a long time, oxidative decomposition and discoloration.

The molecular formula of potassium sorbate is C6H7O2K, white to light yellow scaly crystals, crystal particles or crystal powder, odorless or slightly odorless, easily absorb moisture, oxidize and decompose, and discolour when exposed to air for extended periods of time.

Potassium sorbate​ is often used as a preservative. It destroys many enzyme systems by binding to the sulfhydryl group of the microbial enzyme system. Its toxicity is much lower than other preservatives and it is currently widely used. Potassium sorbate can fully exploit its antiseptic effect in an acidic environment, but has a low antiseptic effect under neutral conditions.