Description
🔬 Specifications of Sodium Metasilicate Pentahydrate
| Property | Specification |
|---|---|
| Chemical Name | Sodium Metasilicate Pentahydrate |
| Chemical Formula | Na₂SiO₃·5H₂O |
| CAS Number | 10213-79-3 |
| Appearance | White crystalline powder or granules |
| Molecular Weight | 212.14 g/mol |
| pH (1% solution) | 12.4 – 12.7 |
| Solubility in Water | Soluble, forming alkaline solution |
| Na₂O Content | ~28–30% |
| SiO₂ Content | ~27–29% |
| Bulk Density | 500–700 kg/m³ |
| Packaging | 25 kg bags, 50 kg bags, or jumbo sacks |
| Shelf Life | 12 months in dry, sealed conditions |
🧪 Applications of Sodium Metasilicate Pentahydrate
1. Detergents and Cleaning Products
It acts as a builder in industrial and household detergents, improving cleaning efficiency by softening water, emulsifying oils, and removing stains. Commonly used in:
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Dishwashing powders
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Laundry detergents
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Industrial degreasers
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Metal cleaning agents
2. Water Treatment
Sodium metasilicate serves as a corrosion inhibitor in boiler water treatment and cooling systems, protecting metal surfaces from scaling and rust.
3. Textile and Dyeing Industry
Used as a scouring and bleaching agent, it enhances the effectiveness of detergents in removing natural fats, waxes, and oils from fabrics.
4. Ceramics and Refractories
In ceramics, it acts as a deflocculant—helping to disperse particles evenly in slurry. It also contributes to binding and hardening in the production of refractory materials.
5. Construction and Adhesives
It improves adhesion and setting in cements, grouts, and tile adhesives, while also enhancing the mechanical properties of concrete.
✅ Benefits of Sodium Metasilicate Pentahydrate
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✔️ Strong alkaline buffer – maintains pH levels during cleaning
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✔️ Corrosion protection – prevents damage to metals in aqueous systems
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✔️ Non-toxic and eco-friendly – safer alternative to phosphates
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✔️ Cost-effective – widely available and easy to handle
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✔️ Excellent cleaning efficiency – dissolves grease, proteins, and dirt
⚠️ Safety and Handling
Sodium metasilicate pentahydrate is alkaline and irritant. Proper handling is essential:
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Wear gloves, goggles, and protective clothing
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Avoid inhalation and contact with skin or eyes
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Store in a dry, well-ventilated area, away from acids and moisture
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In case of contact, rinse thoroughly with water and seek medical advice if irritation persists
📌 Conclusion
Sodium Metasilicate Pentahydrate is a highly effective, multi-purpose chemical widely used in cleaning, water treatment, textile, and ceramic applications. With its strong alkalinity, buffering power, and corrosion inhibition, it offers an eco-friendly and economical solution for both industrial and commercial processes. Its versatility and safety profile make it a valuable addition to any formulation requiring efficient cleaning or pH control.
