Product Category: Industrial Chemicals / Mining & Metallurgical Chemicals
Chemical Name: Sodium Tetraborate Decahydrate
Alternative Names: Borax Decahydrate / Disodium Tetraborate Decahydrate / Borax 10 Mol
CAS Number: 1303-96-4
Chemical Formula: Na₂B₄O₇·10H₂O
Molecular Weight: 381.37 g/mol
Appearance: White, free-flowing crystalline powder or granules
Product Overview
Borax Decahydrate is a refined sodium borate with excellent buffering, fluxing and cleaning properties. It is widely used across metallurgical processing, mining, welding and brazing, detergents, ceramics, glass manufacturing and numerous industrial formulations.
Within metallurgical applications, borates are particularly valuable as fluxing agents because they assist with dissolving metal oxides and protecting molten or heated metal surfaces against oxidation.
Typical Technical Specification
| Property | Typical Reference |
| SKU | MCS-B1 |
| Appearance | White crystalline powder or granules |
| B₂O₃ | Approx. 36.9–38.2% commercial technical grade |
| Na₂O | Approx. 16.4–17.0% |
| Equivalent Na₂B₄O₇·10H₂O | Approx. 101.0–104.6% analytical equivalent |
| pH of Saturated Solution | Approx. 9.2 |
| Solubility | Soluble in water |
| CAS Number | 1303-96-4 |
| Grade | Technical / Manufacturing grades available |
Commercial technical-grade specifications and composition vary by producer. U.S. Borax technical granular material, for example, specifies B₂O₃ at 36.9–38.2% and describes borax decahydrate as a mildly alkaline buffering and fluxing material.
Applications
- Metallurgical fluxes
- Gold and non-ferrous metal processing
- Welding, brazing and soldering fluxes
- Glass and ceramic manufacturing
- Industrial detergents and cleaning products
- Adhesive formulations
- Corrosion-inhibition systems
- Wire drawing
- Refractory applications
- Chemical manufacturing
Key Benefits
- Excellent fluxing characteristics
- Mildly alkaline buffering action
- Assists in dissolving metal oxides
- Useful in metal-processing applications
- Good water solubility
- Multi-purpose industrial borate
Packaging
Available in suitable moisture-resistant industrial bags or bulk packaging subject to grade and quantity.
Storage
Store in a dry, covered environment. Protect from moisture and significant temperature fluctuations, as exposure to changing humidity can promote caking.
