Sodium Silicate (Peroxide Bleaching Stabilizer)
CAS Number: 1344-09-8
Sodium silicate (water glass, SiO2:Na2O ratio 3.2–3.4) is the classic stabilizer for hydrogen peroxide bleaching of cotton and cellulosic fibers. It buffers the alkaline bleaching bath and adsorbs metal ions that would otherwise catalytically decompose H2O2, ensuring controlled bleaching action and preventing fiber damage. Available in liquid form for easy dosing in bleaching ranges.
Technical Specifications
| appearance | Colorless to gray-green viscous liquid |
| active content (%) | ≥98 |
| iron content (ppm) | ≤5 |
| Baumé degree (Be') | 38–40 |
| modulus (SiO2:Na2O) | 3.2–3.4 |
| density (g/mL, 20°C) | 1.37–1.40 |
Applications
- Stabilizing H2O2 in alkaline cotton bleaching baths
- Continuous pad-steam bleaching of cotton woven fabric
- Single-bath scouring-bleaching process for cotton
- Bleaching of linen and viscose under alkaline conditions
- Jigger and beam bleaching of cotton warp
Key Features
- Effective metal ion sequestration to prevent H2O2 catalytic decomposition
- Provides buffering capacity to maintain alkaline bleaching pH
- Cost-effective classic stabilizer with proven performance record
- Silicate-free alternatives available for facilities managing silicate deposits
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CAS Number
1344-09-8
Category
Textile Dyeing AuxiliariesAvailability
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