What is Borax Pentahydrate?
Borax Pentahydrate (Na₂B₄O₇·5H₂O), also known as Sodium Tetraborate Pentahydrate or Borax 5 Mol, is a concentrated form of borax containing five water molecules per formula unit. It has a significantly higher boron content (48.8% B₂O₃) compared to Borax Decahydrate (36.5% B₂O₃), making it the preferred choice for applications where a higher boron concentration per kilogram of product is required.
Polychem Industries supplies Borax Pentahydrate to glass manufacturers, ceramic producers, agricultural chemical companies, and industrial chemical users across India and internationally. Its higher boron content and lower moisture compared to decahydrate make it more economical for boron-intensive applications.
Available Grades
| Grade | Form | Purity | B₂O₃ Content | Applications |
|---|---|---|---|---|
| Industrial Grade | White Granular Powder | 99.5% | Min 48.8% | Glass, ceramics, agriculture, fire retardants |
Decahydrate vs Pentahydrate — Key Differences
Quick Comparison Guide
Applications & Uses
Glass Manufacturing
Preferred over decahydrate in glass manufacturing due to its higher boron content and lower moisture. Used in borosilicate glass, fibreglass, and specialty glass products to improve thermal resistance and reduce melting temperature.
Ceramics & Enamels
Used as a flux in ceramic glazes and vitreous enamels. Its higher boron content per kg makes it more efficient for applications requiring significant boron input, such as low-temperature frits and specialty coatings.
Agriculture & Micronutrient Fertilisers
Used as a concentrated boron source in micronutrient fertilisers. More economical than decahydrate for agriculture applications where a higher boron delivery per kg of product is needed.
Fire Retardant Products
Used in fire retardant formulations for cellulosic materials, insulation, and building products. Higher boron content improves fire retardant efficiency per unit weight of additive.
Wood Treatment
Applied to timber as a preservative against fungi, insects, and termites, and as a fire retardant treatment. Pentahydrate's lower moisture content makes it more suitable for dry application methods.
Chemical Synthesis
Used as a source of boron in the synthesis of boron-containing compounds, specialty chemicals, and as a laboratory reagent for analytical applications.
Technical Specifications
Borax Pentahydrate — Key Properties
Why Source Borax Pentahydrate from Polychem Industries?
- Higher boron content (48.8% B₂O₃) than decahydrate — more economical for boron-intensive applications
- Industrial grade with Certificate of Analysis available on request
- Consistent quality for glass, ceramic and agricultural manufacturers
- Bulk supply capability with reliable year-round availability
- Both Borax Decahydrate and Pentahydrate available from one supplier
- Export documentation experience for international shipments
