To Kill Wild Yeast
Potassium Metabisulphite is an antioxidant. It slows down the aging and oxidation of wine by removing free oxygen suspended in the wine. Oxygen is both harmful and beneficial to wine. It is harmful in large quantities because it rapidly accelerates the aging process. However, wine with too little oxygen your hard work can develop off flavors.
Potassium metabisulphite is often called a stabilizer because it serves to prevent spoilage and further fermentation by removing oxygen. However, adding potassium metabisulphite preserves the flavor and color of a wine. An oxidized wine can turn red wines orange and eventually a very unappealing brown. White wines will also turn brown with too much oxygen.
The dissolving just helps the product blend better into the must but is not a 100% requirement for the sulfite to have the effect needed
***Also, potassium metabisulphite can be very agitating to your eyes and respiratory system. Handle the powder carefully and do not let the dust into your eyes or breathe it in.
Comes in an 1 Kg package and bag of 50 Kg.