Potassium Metabisulfite Market 2022 Potassium metabisulfite is a white crystalline powder possessing a sharp odor of sulfur dioxide. Potassium metabisulfite is commonly called as potassium pyrosulfite and used as an antioxidant, preserving agent and a chemical sterilant. The disulfite property makes it suitable for acting as a substitute for sodium metabisulfite. The breakdown of potassium...