Borax Pentahydrate: Why Industrial Manufacturers Choose This Borate
If you source borates for glass melting, ceramic glazes, boron fertilizer or industrial cleaning, you have likely compared decahydrate borax and anhydrous borax. Among all borax grades, borax pentahydrate stands out as the most balanced option for bulk production.
Sodium tetraborate pentahydrate, commonly known as borax pentahydrate, formula Na₂B₄O₇·5H₂O, trade name ETIBOR-48. It is free-flowing white crystalline granules, containing ~48% B₂O₃. It retains moderate crystal water, avoiding the high moisture weight of borax decahydrate and the strong hygroscopic issue of fully anhydrous borax.
Core Benefits of Borax Pentahydrate
✅ Higher B₂O₃ concentration reduces shipping cost per unit boron ✅ Good stability under normal warehouse storage, less caking risk ✅ Consistent melting behavior for glass and glaze formulations ✅ Versatile, works for agriculture, detergents and metallurgy ✅ Turkish origin grade available with REACH documentation for EU import
Real-World Industry Applications
Glass & Fiberglass Production
Glass producers use borax pentahydrate as a flux agent. It cuts melting temperature of silica, improves thermal shock resistance and chemical durability of borosilicate glass and insulation fiberglass. Fiberglass manufacturers favour this grade for stable fibre forming and consistent finished tensile strength.
Ceramic Tile Glazes & Enamel
In ceramic frit and glaze recipes, borax pentahydrate promotes uniform melting during firing. It delivers smooth, glossy glaze surfaces while minimising pinholes and firing defects. Vitreous enamel manufacturers rely on it to enhance surface hardness and scratch resistance.
Agriculture: Boron Micronutrient
Boron is critical for plant pollination, cell wall development and fruit setting. Borax pentahydrate is widely used for soil application and foliar treatment, correcting boron deficiency for fruit trees, vegetables and field crops.
Industrial Cleaning & Water Treatment
As a pH buffer and water softener, borax pentahydrate binds calcium and magnesium ions in hard water, improving surfactant performance in industrial detergents. It also offers mild anti-corrosion properties for water treatment systems.
Brazing Flux, Fire Retardant & Boron Chemical Raw Material
It serves as brazing flux to remove oxide layers on metal surfaces. Manufacturers also use it for wood fire retardant treatment and as feedstock to synthesise other boron compounds.
Borax Pentahydrate vs Other Borax Grades (Quick Reference Table)
| Product | B₂O₃ Content | Key Feature | Typical End Use |
|---|---|---|---|
| Borax Pentahydrate | ~48% | Balanced water content, cost stable | Glass, ceramic, agriculture |
| Borax Decahydrate | ~37% | More crystal water, lower boron | Household cleaning, small formulation |
| Anhydrous Borax | ~68-70% | No crystal water, highly hygroscopic | High-temperature industrial process |
Handling & Storage Best Practices
- Store in dry, ventilated warehouse, keep packaging sealed
- Avoid direct exposure to high humidity to prevent caking
- Keep away from strong acids
- Wear gloves and safety goggles during handling; prevent dust inhalation
- Standard packing: 25kg PE-lined PP bags, 1000kg jumbo bags for bulk orders
Common Questions from Bulk Buyers
Is borax pentahydrate REACH registered?
Our Turkish ETIBOR-48 borax pentahydrate comes with REACH registration, suitable for industrial import into the EU. Please note EU restrictions for consumer finished goods.
What documents can you supply for import clearance?
We provide COA, SDS, commercial invoice, packing list and certificate of origin upon request.
What is the lead time for bulk orders?
Container shipments can be arranged based on stock availability, contact us for latest quotation and lead time.
Wrap Up
For most industrial buyers, borax pentahydrate hits the sweet spot between performance, stability and logistics cost. If you are tired of inconsistent boron content or high freight expenses from low-concentration borax, it is worth testing borax pentahydrate in your formulation.
Ready to get a bulk quotation or sample? Send us your required quantity and target specification.