Stabilizer, prevents renewed fermentation, use 1/2 teaspoon per gallon before back-sweetening. Also, use in conjuncture with potassium metabisulphite. If used alone, potassium sorbate can cause a geranium reaction, making your wine smell and taste like geraniums, yuck! Potassium metabisulphite counteracts that reaction, and is also a preservative!
