Overview
Borax powder, chemically known as sodium borate, is a naturally occurring mineral refined into a white crystalline powder. It has been used for centuries in various industrial and household applications due to its alkaline and buffering properties. In its decahydrate form (Na₂B₄O₇·10H₂O), borax is commonly utilized in detergents, water softeners, and as a flux in metallurgy. Its versatility stems from its ability to dissolve in water and react with acids, making it a valuable compound in multiple industries.
Physical and Chemical Properties
Borax powder exhibits a density of 1.73 g/cm³ and melts at 743°C in its anhydrous form. It decomposes at 1,575°C, releasing water and forming a glass-like substance. The compound is highly soluble in water and glycerol but only slightly soluble in alcohol. Its alkaline nature (pH ~9.2 in solution) makes it effective as a cleaning agent and buffering agent. Borax also acts as a flame retardant by releasing water when heated, which helps suppress combustion.
Main Applications
Borax powder is widely used in the manufacturing of detergents and cleaning products due to its ability to soften water and enhance surfactant performance. In metallurgy, it serves as a flux to remove oxide impurities from metal surfaces during soldering and welding. Other applications include glass and ceramic production, where it lowers melting points and improves durability. In agriculture, borax is used as a micronutrient fertilizer and pesticide. It also finds niche uses in DIY slime formulations and taxidermy.
Safety and Storage
Borax powder is classified as harmful if swallowed or inhaled and can irritate skin and eyes. Proper handling requires gloves, goggles, and respiratory protection in dusty environments. Avoid contact with acids, as reactions may release toxic fumes. Store borax in a cool, dry place in sealed containers to prevent moisture absorption. Keep away from food products and incompatible chemicals like strong acids or oxidizing agents. Disposal should comply with local environmental regulations.
B2B Procurement Guide
When procuring borax powder for industrial use, prioritize suppliers with certifications such as ISO 9001 or REACH compliance. Key specifications to verify include purity (typically ≥99.5%), particle size, and moisture content. Packaging options include 25-50 kg moisture-proof bags or bulk containers for large-scale buyers. Compare prices from multiple vendors, factoring in logistics costs. For international shipments, ensure proper labeling and adherence to hazardous material transport regulations.
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