Potassium sorbate is white to light yellow scaly crystal, crystalline powder or granular. Odorless or slightly odorous. Long-term storage in the air is easy to absorb moisture and oxidative decomposition and color. Relative density (d2025) 1.363. Melting point 270 ℃ (decomposition). Easily soluble in water (67.6g/100ml, 20℃) 5% saline (47.5g/100ml, room temperature), 25% sugar water (5lg/100ml Chemicalbook, room temperature). Soluble in propylene glycol (5.8g/100m1) and ethanol (0.3g/100m1). The Ph value of 1% aqueous solution is 7-8. It has a strong inhibitory effect on spoilage bacteria and mold, and has become the most important preservative in the world because its toxicity is far lower than other preservatives. It can give full play to its anti-corrosion effect under acidic conditions, and its effect is very low when it is neutral. Uses in the food industry as preservatives, antifungal agents