Potassium sorbate is a aliment brand bactericide about admired as safe (GRAS) worldwide. It is the abeyant alkali of sorbic acid. It readily dissolves in baptize area it converts to sorbic acid, its alive form, at a low pH. Sorbic acid is actual pH dependent. While it shows some action up to pH 6 (about 6%), it is a lot of alive at pH 4.4 (70%). At pH 5.0 it is 37% active. As sorbic acid, it is advised to be alive adjoin mold, fair adjoin aggrandize and poor adjoin a lot of bacteria. Sorbic acid is an unsaturated blubbery acid and as such is accountable to blaze (use of an antioxidant like Mixed Tocopherols T50 is recommended). It is aswell acute to UV ablaze and may about-face chicken in solution. Gluconolactone is appear to balance potassium sorbate adjoin birthmark and concealment in aqueous solutions and may be advantageous in stabilizing sorbic acid in the baptize appearance of a product.
While sorbic acid is by itself occurring in some fruits (like the berries of the abundance ash), around all of the world’s assembly of sorbic acid, from which potassium sorbate is derived, is bogus synthetically, and is a nature-identical admixture chemically agnate to the atom begin in nature. It is a broadly acclimated bactericide in aliment production, but cannot be advised “natural” (no amount what you’ve heard!).
Sorbic acid can could cause acquaintance dermatitis at concentrations aloft or beneath 0.5%. Studies appearance that if it is acclimated at a absorption of no added than 0.2% it is absurd to aggregate a assurance hazard.
Potassium sorbate is not a ample spectrum bactericide for corrective use and should be accumulated with added preservatives. If potassium sorbate is acclimated as a preservative, the pH of the accomplished artefact may charge to be bargain for potassium sorbate to be effective. This is because potassium sorbate is the abeyant alkali anatomy of sorbic acid. To be useful, the pH of the conception have to be low abundant to absolution the chargeless acid for advantageous activity.