Potassium metabisulfite can be used throughout the winemaking process from grape receipt to finished wine to adjust sulfur dioxide (SO​​​​​​​​​​​​​​​ 2 ​​​​​​​​​). Downloads IOC-POTASSIUM METABISULFITE - Technical Data Sheet IOC-POTASSIUM METABISULFITE - Allergen Statement IOC-POTASSIUM METABISULFIT