Borax Anhydrous
- Name: Borax Anhydrous/Sodium Tetraborate
- Molecular Formula: Na2B4O7
- Molecular weight: 201.22
- Properties: white crystal or vitreous crystal
- CAS#: 1330-43-4
- HS CODE: 2840110000
- Uses: glass, glaze, solder, enamel, smelting, co-solvent for non-ferrous metals and alloys, etc.
Anhydrous borax sodium tetraborate is mainly used in the manufacture of metallurgical horizontal casting, metal frit, heat-resistant and high-quality glass, optical glass, ceramic and enamel glaze, detergents and bleach, cleaning agents, flame retardants, rust prevention, binders. It can also be used as a carrier of lubricants in metal wire drawing, as a stabilizer and skeleton formation in refractories, as a wrapping flux in metallurgy, a retarder for cement and concrete, a pH buffer in water systems, and an emulsifier for paraffin.
| Inspection items | request | Inspection ixdex |
| Anhydrous borax(Na2B4O7) | %≥ | 99.5 |
| Sodiumo xide(Na2O) | %≥ | 30 |
| Boron oxide(B2O3) | %≥ | 68.7 |
| Iron(Fe) | ≤ | 50 ppm |
| Sulfuricacid(SO4) | ≤ | 135 ppm |
| Moisturecontent | %≤ | 0.5 |
| Particle size (50 mesh standard sieve pass rate) | %≥ | On request |
| Appearance white crystal partel | White crystalline granules |