Overview
Sodium Silicate (40°Bé) is a highly alkaline solution of sodium oxide (Na2O) and silicon dioxide (SiO2), commonly known as water glass. It is widely used in industrial applications due to its adhesive, binding, and corrosion-inhibiting properties. The 40°Bé designation refers to its specific gravity on the Baumé scale, indicating a standardized concentration for commercial use. This compound is produced by fusing sand (silica) with sodium carbonate at high temperatures, followed by dissolution in water. Its versatility makes it a key ingredient in detergents, construction materials, and water treatment processes. B2B buyers often procure it in bulk liquid form for large-scale industrial applications.
Physical and Chemical Properties
Sodium Silicate (40°Bé) appears as a colorless or slightly viscous liquid with a density of approximately 1.4 g/cm³. It is highly soluble in water but insoluble in organic solvents. The solution is strongly alkaline, with a pH typically ranging from 11 to 12.5, making it effective for neutralizing acidic compounds. One of its notable chemical properties is its ability to form gels or solids upon exposure to carbon dioxide or acidic conditions, which is leveraged in adhesives and cement applications. Its viscosity and stability are influenced by temperature and concentration, requiring careful handling during transport and storage.
Main Applications
In the detergent industry, Sodium Silicate (40°Bé) acts as a builder to enhance cleaning efficiency and prevent corrosion of washing machines. It is also a key component in adhesives for paper, cardboard, and wood due to its strong binding properties. In construction, it is used as a binder in cement and as a sealant for porous materials. The compound plays a critical role in water treatment, where it helps remove heavy metals and stabilize pH levels. Other applications include textile processing (fabric bleaching and dyeing), foundry molds, and fireproofing materials. Its versatility ensures demand across multiple industrial sectors.
Safety and Storage
Due to its corrosive nature, Sodium Silicate (40°Bé) requires careful handling. Workers should wear gloves, goggles, and protective clothing to avoid skin and eye contact. Inhalation of mists or fumes should be prevented with adequate ventilation or respiratory protection. Storage must be in airtight containers to avoid exposure to air, which can cause solidification. The solution should be kept in a cool, dry place away from acids and metals that may react with it. Spills should be neutralized with weak acids (e.g., vinegar) and rinsed with plenty of water.
B2B Procurement Guide
When procuring Sodium Silicate (40°Bé), verify the Baumé concentration (40°Bé) and purity levels to ensure suitability for your application. Reputable suppliers should provide Material Safety Data Sheets (MSDS) and technical specifications. Bulk purchases often come in tanker trucks or intermediate bulk containers (IBCs), reducing costs for large-scale users. Consider logistical factors such as storage capacity and handling equipment, as the product’s viscosity may require pumps or heated storage in colder climates. Price negotiations should account for volume discounts and long-term supply agreements, with reference prices typically ranging from $300 to $500 per ton.
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