Potassium Sorbate can restrain effectively the activity of mould, yeast and aerophile bacteria.Restrain growth and reproduction of the pernicious micro-organism as pseudomonas staphylococcus salmonella action to restrain growth is more powerful than killing.Meanwhile it can not restrain useful microorganism growth as anaerobic spore-bearing bacilli,  cidophil therefore to lengthen food store period and remain food original  flavor,the preservative efficiency of potassium sorbate is 5-10 times sodium benzoate.

High safety
Potassium sorbate is one kind of nonsaturated fatty acid compounds. It can be absorbed by human body rapidly, then decomposed into CO2 and H2O, moreover no remaining in body.