What is Sodium Bisulphite?

Sodium Bisulphite (NaHSO₃) is a white crystalline or powdery chemical compound that functions primarily as a reducing agent, oxygen scavenger, and preservative in various industrial and commercial applications. It is highly soluble in water, producing a slightly acidic solution with sulfurous odor.

This compound is known for its ability to neutralize chlorine, prevent oxidation, and inhibit microbial growth, making it valuable in industries ranging from water treatment to food processing and pharmaceuticals.

Sodium Bisulphite reacts with dissolved oxygen and other oxidizing agents, helping protect equipment and products from oxidative damage. However, it should be handled with care, as it may release sulfur dioxide (SO₂) gas, which can irritate the respiratory system.

USES AND APPLICATIONS

INDUSTRIES

Sodium Bisulphite is widely used in:

• Boiler water and cooling water systems (as an oxygen scavenger)

• Textile and leather processing (as a bleaching and dechlorination agent)

• Food and beverage industry (as a preservative and antioxidant)

• Pharmaceuticals and cosmetics (as a stabilizer)

• Pulp and paper industry (for bleaching and chlorine removal)

• Photography (in developer solutions)

• Mining and chemical manufacturing (in reduction and purification processes)

KEY ADVANTAGES

• Strong reducing agent

• Effective oxygen and chlorine scavenger

• Widely used food-grade preservative (under controlled limits)

• Controls oxidation and microbial activity in processing systems