Potassium sorbate is the potassium salt of sorbate, it is a kind of preservative allowed in our country. It is white to light yellow flake crystals, crystal particles or crystal powder, odorless or slightly smelly, long-term exposure to the air is easy to absorb moisture, be decomposed by oxidation and discoloration. Potassium sorbate is soluble in water, propylene glycol and ethanol. Because sorbate is insoluble in water and inconvenient to use, potassium sorbate is often used.

1, Potassium sorbate is mainly used as food preservative, also used in cosmetics and feed anti-mildew, etc. It has strong inhibition of putrefying bacteria and mold, and is easily soluble in water and widely used. Its antibacterial effect is stronger than bactericidal effect. The lower PH value is, the stronger antibacterial effect is.2, Sorbate (potassium) can effectively inhibit the activity of mold, yeast and aerobic bacteria, but also can prevent the growth and reproduction of staphylococcus, salmonella and other harmful microorganisms, but almost ineffective for anaerobic bacillus and lactobacillus acidophilus and other beneficial microorganisms, its inhibiting effect is stronger than sterilization effect, Thus, the preservation time of food can be extended effectively and the flavor of the original food can be maintained. Its anti-corrosion effect is 5-10 times that of similar products sodium benzoate.3, As a cosmetic preservative