Sodium Sulphite

Sodium Sulphite

CAS Number : 7757-83-7
IUPAC Name : Sodium sulfite
HS Code : 28321000
Formula : Na₂SO₃
Basic Info
Appearance Name : White crystalline powder or granules
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A reducing agent commonly used in water treatment, pulp and paper bleaching, and as an oxygen scavenger in boilers. It also plays a role in food preservation and photographic chemical processes.

1. Pulp & Paper Industry – Used as a bleaching agent in the production of paper and cardboard, helping to remove lignin and improve paper brightness and quality.

2. Water Treatment – Acts as an oxygen scavenger in boiler water treatment to prevent corrosion in pipes and equipment by reducing dissolved oxygen levels.

3. Food & Beverage Industry – Used as a preservative and antioxidant in dried fruits, wines, and canned foods to prevent oxidation and discoloration, extending shelf life.

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