If you’re not familiar with the chemical potassium sorbate, then you are probably someone who doesn’t often read product labels. Potassium sorbate is used in tons of products as a preservative – from foods, to cosmetics, to pharmaceuticals. It has GRAS (Generally Recognized as Safe) status and is widely regarded as a safe, all-purpose antimicrobial and anti-fungal agent. Next time you’re snacking on some dried fruit, check the label for potassium sorbate – it might also be listed as E – 202. (It is almost never referred to by its IUPAC name, 2,4-hexa-2,4-dienoate.)