Sodium Bi Sulphite
Sodium Bisulphite is a white crystalline powder or yellowish solution with a pungent sulfur-like smell. Known for its strong reducing and antioxidant properties, it is widely used in water treatment, food preservation, textile dyeing, and chemical manufacturing. It reacts easily with chlorine and oxygen, making it effective in dechlorination and antioxidant applications. Though not flammable, it can release sulfur dioxide gas when heated or in acidic environments, so must be handled with proper ventilation and care.
Synonyms
Sodium Hydrogen Sulfite ; Sodium Acid Sulfite ; Sodium Hydrosulfite ; Sodium Bisulfite ; Sodium BiS ; SBS ; Sodium hydrogen sulfite
Formula
NaHSO₃
CAS No
7631-90-5
HS Code:
28321010
Industries Served
- Water Treatment Industry
- Textile Industry
- Food & Beverage Industry
- Pulp & Paper Industry
- Photographic Industry
- Chemical Industry
- Leather Industry
- Mining Industry
Applications
- Used to remove excess chlorine and neutralize disinfectants in treated water before discharge or reuse
- Acts as a preservative (E222) in dried fruits, wines, fruit juices, and vegetables to prevent oxidation and spoilage
- Used for bleach neutralization and dyeing preparation, especially in dechlorination stages
- Helps in bleaching processes and removing residual chlorine during pulp production
- Functions in fixing solutions to stabilize the image and prevent oxidation
- Used as a reducing agent in chemical synthesis and manufacturing of other sulphur-based compounds
- Applied in deliming hides and cleaning post-lime processing
- Plays a role in cyanide detoxification in gold extraction processes
