Sodium sulfite ( Na₂SO₃ ) is an inorganic, white, odorless crystalline powder that is highly soluble in water. It is widely recognized as a versatile reducing agent and antioxidant.
Sodium bisulfite (or sodium bisulphite, sodium hydrogen sulfite) is an inorganic, white to yellowish-powder with a slight odor of sulfur dioxide. With the chemical formula NaHSO.
Sodium metabisulfite (Na₂S₂O₅), also known as sodium pyrosulfite, is an inorganic compound widely utilized as a disinfectant, antioxidant, and preservative agent in various industries.