Sodium Disilicate N-Hydrate CAS 13870-28-5

Chemical Name: Sodium Disilicate N-Hydrate
CAS No.: 13870-28-5
Molecular Fomula: H3NaO5Si2
Appearance: Colorless crystal

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Comprehensive Guide to Sodium Disilicate N-Hydrate (CAS 13870-28-5)

Table of Contents

1. Product Overview & Specifications

Parameter Sodium Disilicate N-Hydrate Sodium Metasilicate Sodium Orthosilicate
CAS Number 13870-28-5 6834-92-0 1344-09-8
Chemical Formula Na2Si2O5·nH2O Na2SiO3 Na4SiO4
pH (1% Solution) 12.5-13.5 12.0-12.8 13.0-13.8
Solubility in Water 220 g/L (20°C) 500 g/L 150 g/L

2. Industrial Applications

2.1 Ceramic Manufacturing

Acts as flux agent to reduce melting temperature (1,300°C → 1,150°C), improving energy efficiency in kiln operations.

2.2 Detergent Formulations

Enhances cleaning power through pH buffering (optimal range 12.2-12.8) and calcium ion sequestration (200 mg CaCO3/g).

2.3 Water Treatment

Removes heavy metals (95% Pb2+ removal at 50 ppm concentration) through chelation and precipitation mechanisms.

3. Usage Guidelines

3.1 Ceramic Production Protocol

  1. Mix 2-5% by weight with raw materials
  2. Maintain 20-40°C during slurry preparation
  3. Fire at 1,150-1,250°C for optimal results

3.2 Detergent Compounding

  1. Combine 15-25% sodium disilicate with surfactants
  2. Maintain moisture content below 8% during mixing
  3. Granulate at 50-60°C for stable particle formation

4. Practical Implementation Scenarios

4.1 Wastewater Treatment Plant Optimization

Municipal plant in Essen achieved 40% reduction in sludge volume using 0.5 g/L dosage in primary treatment.

4.2 High-Strength Ceramic Development

3% addition increased MOR (Modulus of Rupture) from 35 MPa to 48 MPa in alumina ceramics.

5. Client Success Stories

5.1 ABC Ceramics Co., Ltd. (Guangdong, China)

  • Challenge: 18% energy overconsumption in tunnel kilns
  • Solution: 4% sodium disilicate additive in body mix
  • Result: 22% fuel cost reduction, ISO 13006 compliance achieved

5.2 EuroClean Detergents GmbH (Hamburg, Germany)

  • Challenge: Phosphate-free formulation performance drop
  • Solution: 18% sodium disilicate replacement in dishwasher tablets
  • Result: 15% better cleaning scores, ECOCERT certification obtained

6. Request Customized Solutions

Contact our technical team for application-specific formulations:

Why choose us?

  • 99.9% chemical purity guaranteed
  • Custom particle size distribution (10-200μm available)
  • ISO 9001 & REACH compliant production
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