Sodium Silicate
Versatile compound used in various industries for its adhesive properties.
Sodium Silicate
- CAS Number: 1344-09-8
- UN NO.: 1824
- EINECS NO.: 215-687-4
- Molecular Formula: Na2SiO3 or Na2O·SiO2
- Purity (%): Typically available in various purity levels, such as 99% and above.
- Appearance: Colorless, slightly tinted, translucent to transparent vitreous mass
- Package: drums, intermediate bulk containers (IBCs), or bulk tanker shipments
- Other Name: Water Glass, Soluble Glass, Liquid Glass, Sodium Metasilicate, Sodium Orthosilicate
Sodium Silicate Specification
| ITEMS | SPECIFICATIONS |
| Baumé degree (°Be’/20°C) | 38 – 60 |
| Sodium Oxide (Na₂O) Content, % | ≥ 8.2 |
| Silicon Dioxide (SiO₂) Content, % | ≥ 26.0 |
| Modulus (M) | 3.10 – 3.40 |
| Iron Content (ppm) | < 70 ppm |
| Transmittance, % | > 90 |
| ITEMS | SPECIFICATIONS |
| Baumé degree (°Be’/20°C) | – |
| Sodium Oxide (Na₂O) Content, % | ≥ 24 |
| Silicon Dioxide (SiO₂) Content, % | ≥ 65 |
| Modulus (M) | 2.1 – 3.63 |
| Iron Oxide, % | 0.015-0.03 |
Selection Guide: Choosing the Right Molar Ratio
The ratio of SiO2 to Na2O is the primary performance indicator for Sodium Silicate.
1. Low Ratio (<2.5)
Higher alkalinity. Preferred for Heavy-Duty Cleaners and Metal Degreasing, where rapid soil removal and high pH maintenance are required.
2. High Ratio (>3.0)
Lower alkalinity but higher silica content. Ideal for Adhesives, Foundry Core Binding, and Concrete Hardening, as it sets more rapidly and forms stronger mineral bonds.
Types of Sodium Silicate
Core Features & Technical Advantages
HOO CHEMTEC’s Sodium Silicate is produced through high-temperature fusion of high-purity silica sand and soda ash, ensuring consistent molar ratios and low impurity profiles.
- Powerful Binding & Adhesive Strength: Acts as a rapid-setting inorganic adhesive for paperboard, refractory cements, and foundry molds.
- Excellent Detergency & Buffering: In soaps and detergents, it prevents the redeposition of dirt, aids in emulsification, and provides essential alkaline buffering to protect surfaces.
- Superior Corrosion Inhibition: Forms a microscopic silica film on metal surfaces, protecting water pipes and industrial equipment from oxidation and lead/copper leaching.
- Exceptional Soil Stabilization: Reacts with soil components to create an impermeable, load-bearing matrix, essential for tunnel construction and foundation repair.
- Adjustable Rheology: Our liquid grades can be customized in terms of viscosity and solids content to suit specific automated application systems.
What is Sodium Silicate Used for
For Cleaning & Detergents: It acts as a builder in synthetic detergents and soaps, enhancing cleaning power and stabilizing foam.
In Construction & Materials: Sodium Silicate serves as a binder for manufacturing refractory materials, acid-resistant cement, and as a grouting agent for soil stabilization and waterproofing.
In Papermaking: It is used as a filler, bleaching aid, and binder in the production of paperboard.
In Foundry: Sodium Silicate functions as a binder for sand molds, allowing for rapid hardening.
In Textile Industry: It is applied as a sizing agent, impregnating agent, and dye-fixing agent.
In Petroleum Drilling: Sodium Silicate is added to drilling mud to stabilize the borehole wall.
As a Chemical Raw Material: Sodium Silicate is the starting material for producing silica gel, molecular sieves, and precipitated silica.
For Water Treatment: It acts as a corrosion inhibitor, particularly in chlorinated water systems.
FAQ of Sodium Silicate
The solid “lump” form is the raw result of the furnace fusion process and is more cost-effective for long-distance export. The liquid form is produced by dissolving the lumps in water under high pressure and temperature, providing a ready-to-use solution for factories.
It penetrates the surface and reacts with calcium hydroxide to form a crystalline structure. This process “densifies” the concrete, making it significantly harder and resistant to water and chemical penetration.
Yes, it is an inorganic, mineral-based chemical. It is generally considered environmentally friendly as it eventually breaks down into silica and sodium carbonate, both of which are naturally occurring.
Our Sodium Silicate powder is supplied in big bags (ton bags) with a capacity of 1 to 1.4 metric tons per bag. Custom packaging options are available to meet specific requirements.
Sodium Silicate should be stored in a cool, dry, and well-ventilated place. For the liquid form (water glass), ensure the container is tightly sealed to prevent absorption of carbon dioxide and evaporation. The powder form must be kept in moisture-proof packaging to avoid caking.
Sodium Silicate for Sale
As an integrated silicate manufacturer, HOO CHEMTEC ensures your procurement timeline is predictable and cost-effective, offering high-purity Sodium Silicate designed for global export.
- Production Capacity: 8,000 MT per annum.
- Logistics: Strategic loading from Qingdao or Shanghai ports.
- Customization: We can adjust the Baumé (density) of liquid grades to meet specific automated equipment requirements.
The HOO CHEMTEC Advantage: Why B2B Partners Trust Us
- Factory-Direct Pricing: Eliminate trading markups and benefit from stable, competitive wholesale rates directly from our furnace facility.
- Regulatory & ESG Compliance: Full GHS-compliant SDS and REACH registration support, ensuring seamless customs clearance for EU and North American markets.
- Flexible Industrial Packaging: Liquid available in 200L drums or 1000L IBC Totes; Solid available in 1000kg or 1250kg jumbo bags with moisture-proof liners.
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