SO3Na

SO3Na refers to the chemical formula for sodium sulfite. It is an inorganic compound composed of sodium cations (Na+) and sulfite anions (SO32-). Sodium sulfite typically appears as a white crystalline powder and is soluble in water. It is a salt of sulfurous acid.

In industrial applications, sodium sulfite is utilized as a reducing agent. It is commonly employed in water treatment processes to remove dissolved oxygen, thereby preventing corrosion in boiler systems. It also finds use in the pulp and paper industry as a bleaching agent and in textile manufacturing as a dechlorinating agent.

In photography, sodium sulfite acts as a preservative for developing solutions, preventing their oxidation. In the food industry, it is sometimes used as a preservative and antioxidant, although its use is regulated in many countries. It can help maintain the color and texture of certain food products. It is also a component in some laboratory reagents.