Borax Pentahydrate
Disodium Tetraborate Pentahydrate; Sodium Tetraborate Pentahydrate; E285
Key applications
Raw materials for the horticultural industry,
Raw materials for household chemicals production,
Raw materials for paint and varnish production,
Raw materials for the production of adhesives, oils, lubricants,
Raw materials for fertilizer production,
Raw materials for glass and ceramics production,
Raw materials for plastics production
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Sodium Tetraborate Pentahydrate – Chemical Properties
Sodium Tetraborate Pentahydrate, also known as Borax 5-hydrate or Disodium Tetraborate Pentahydrate, is a chemical compound with the formula Na₂B₄O₇·5H₂O. It appears as colorless, odorless crystals that gradually weather when outside and are moderately soluble in water. The molecular weight of this compound is approximately 291.3 g/mol, and it begins to lose its water of hydration at around 122°C (252°F). Borax Pentahydrate is used across various industries, including glass manufacturing, ceramics, fertilizers, and cosmetics.
- Melting point: 200°C (392°F)
- Density: 1.82 g/cm³
- Solubility: Soluble in water (3% at room temperature)
Industrial Applications of Borax 5-Hydrate
In industrial processes, Disodium Tetraborate Pentahydrate plays a crucial role in various sectors:
- Glazes and enamels: As a key ingredient in ceramics and glass manufacturing, Borax 5-hydrate serves as a flux, lowering the melting point of silica. It improves the durability of glazes and helps achieve a smooth finish.
- Flux in soldering: In metallurgy, Borax Pentahydrate acts as a fluxing agent, preventing metal oxidation during soldering processes. This ensures strong, reliable bonds in electronic and plumbing components.
Sodium Tetraborate Pentahydrate as a Cleaning Agent
Borax 5-Hydrate is widely used in cleaning products due to its effectiveness and safety:
- Laundry detergents: Enhances the performance of detergents by softening water, allowing surfactants to work more efficiently. This leads to brighter fabrics and improved cleaning results.
- Household cleaners: Borax is a common ingredient in surface cleaners, helping eliminate odors and stubborn stains.
Borax Pentahydrate in Textile Treatment and Fire-resistant Products
This compound is also essential in fire protection applications:
- Textiles: Borax Pentahydrate is used to impregnate fabrics, enhancing fire resistance. This is particularly important for upholstery, curtains, and other textile materials.
- Wood treatment: Borax 5-hydrate serves as a fire retardant in wood products, reducing flammability and improving fire safety in construction materials. This application is especially beneficial in environments where fire prevention is critical.
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