Sodium Sulfate Anhydrous (CAS 7757-82-6): Technical Guide & Industry Applications
Table of Contents
1. Product Specifications & Comparative Analysis
| Parameter | Sodium Sulfate Anhydrous | Alternative Compounds |
|---|---|---|
| CAS Number | 7757-82-6 | N/A |
| Molecular Formula | Na2SO4 | Na2CO3 (Soda Ash) |
| Molecular Weight | 142.04 g/mol | 105.99 g/mol |
| Appearance | White crystalline powder | White powder |
| Melting Point | 884°C | 851°C |
| Density | 2.68 g/cm3 | 2.54 g/cm3 |
| Solubility in Water | 18.5 g/100 mL (20°C) | 21.6 g/100 mL (20°C) |
| pH (5% Solution) | 5.2–9.2 | 11.5–12.5 |
Key Advantages: Superior hygroscopic properties, high thermal stability (decomposes at 1404°C), and non-flammability make it ideal for high-temperature industrial processes.
2. Key Industrial & Commercial Applications
2.1 Core Industrial Uses
- Detergent Manufacturing: Primary filler in powdered detergents (30–50% composition) for improved flow properties
- Glass Production: Fluxing agent to eliminate air bubbles (replaces 10–15% of soda ash)
- Textile Processing: Leveling agent in dye baths with 5–10 g/L concentration
- Pulp & Paper: Kraft process chemical with 80–100 kg/ton pulp consumption
2.2 Pharmaceutical Applications
- Drying agent in organic synthesis (5–10% w/w)
- Laxative preparations (3–15 g/dose)
- Protein crystallography (0.8–1.2 M solutions)
2.3 Food & Agriculture
- FDA-approved dough conditioner (≤0.5% flour weight)
- Animal feed additive (0.3–0.5% in ruminant diets)
3. Practical Use Cases Across Industries
Case A: Textile Dye Optimization
Challenge: Inconsistent color absorption in polyester fabrics
Solution: 8 g/L sodium sulfate in dye bath at 130°C
Outcome: 22% improvement in color uniformity
Case B: Pharmaceutical Tablet Production
Challenge: Moisture-induced tablet capping
Solution: 7% anhydrous sodium sulfate in granulation
Outcome: Reduced moisture absorption by 40%
4. Verified Customer Success Stories
Client 1: Tianjin Jishengkang Chemical Co., Ltd.
Application: Detergent filler production
Volume: 500 MT/month
Specs: 99.2% purity, 50kg moisture-proof bags
Results: 15% production cost reduction
Client 2: Nanjing Senbeijia Biotech
Application: Protein crystallization research
Grade: AR, 99.5% purity
Outcome: Successful crystallization of 8 novel proteins
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