Overview
Liquid sodium silicate, commonly known as water glass, is a chemical compound with the formula Na2SiO3. It is produced by fusing sodium carbonate and silica sand at high temperatures, followed by dissolution in water. The resulting solution is highly alkaline and exhibits adhesive and binding properties, making it valuable in various industrial applications. Liquid sodium silicate is available in different grades, varying in the ratio of silica to sodium oxide (SiO2:Na2O). These grades determine the viscosity and reactivity of the solution, which in turn influence its suitability for specific uses. The compound is widely used in detergents, adhesives, and construction materials due to its versatility and cost-effectiveness.
Physical and Chemical Properties
Liquid sodium silicate is a clear, viscous liquid with a density ranging from 1.35 to 1.50 g/cm³. It is highly soluble in water, forming alkaline solutions with pH values typically between 11 and 13. The compound's adhesive properties stem from its ability to form silica gels upon reaction with acids or carbon dioxide. The viscosity of liquid sodium silicate depends on its concentration and the SiO2:Na2O ratio. Higher ratios result in thicker solutions with greater binding strength. The compound is stable under normal storage conditions but can solidify or crystallize if exposed to extreme temperatures or prolonged evaporation.
Main Applications
Liquid sodium silicate is a key ingredient in detergents and soaps, where it acts as a builder to enhance cleaning efficiency. Its alkaline nature helps break down grease and stains, making it particularly useful in industrial and household cleaning products. In the construction industry, liquid sodium silicate is used as a binder in cement and refractory materials. It improves the durability and fire resistance of these products. Additionally, it serves as an adhesive in paper, cardboard, and textile manufacturing, providing strong and flexible bonds.
Safety and Storage
Liquid sodium silicate is corrosive and can cause skin and eye irritation upon contact. Proper personal protective equipment (PPE), including gloves and goggles, should be worn when handling the compound. In case of exposure, affected areas should be rinsed immediately with plenty of water. Storage conditions are critical to maintaining the quality of liquid sodium silicate. It should be kept in sealed containers to prevent evaporation and contamination. The storage area should be cool and dry, away from direct sunlight and incompatible materials such as acids, which can cause rapid gelation.
B2B Procurement Guide
When procuring liquid sodium silicate, buyers should specify the desired SiO2:Na2O ratio and concentration to ensure the product meets their application requirements. It is also important to verify the supplier's quality control measures and certifications, such as ISO standards. Pricing varies based on purity, concentration, and order volume. Bulk purchases typically offer cost savings, but buyers should consider storage capacity and shelf life to avoid waste. Reliable suppliers should provide material safety data sheets (MSDS) and technical support to assist with product selection and handling.
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