sodium bisulfite cas 7631-90-5

Product Overview: Sodium Bisulfite (CAS 7631-90-5)

1. Basic Information & Parameter Comparison

2. Detailed Applications

Key Industrial Uses:

• Textile Industry: Fiber bleaching agent and dye intermediate stabilizer.
• Water Treatment: Heavy metal precipitation and dechlorination agent.
• Food Preservation: Antioxidant (E222) for beverages and dried fruits.
• Pharmaceuticals: Intermediate in analgesics like metamizole sodium.
• Photography: Developer solution component.

3. Usage Guidelines

Safety Protocols:

• Wear PPE: Acid-resistant gloves, goggles, and ventilation masks.
• Storage: Keep in sealed containers at <25°C, separate from acids/oxidizers.
• Emergency Response: Rinse exposed areas with water for 15 mins; seek medical aid if ingested.

4. Case Studies

Case 1: Municipal Water Dechlorination
A 500,000-population city reduced chlorine residuals by 98% using 2.5 ppm sodium bisulfite injection, achieving EPA compliance.

Case 2: Paper Pulp Bleaching
Integrated 0.8% sodium bisulfite in kraft pulping reduced lignin content by 40%, enhancing paper whiteness (ISO 80→92).

5. Client Success Stories

Client A: Chemical Manufacturer (Shandong)
Annual consumption: 850 metric tons for thiourea dioxide production, achieving 99.2% purity.

Client B: Beverage Company (Guangdong)
Extended shelf life of fruit juices by 6 months using 200 ppm sodium bisulfite, meeting GB 2760 standards.

6. Inquiry & Contact

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