95% Sodium Tetraborate 200Mesh

Product Introduction

Also known as: Anhydrous Sodium Tetraborate, Sodium Tetraborate, Sodium Borate

English Name: Sodium Tetraborate

Chemical Formula: Na₂B₄O₇

Molecular Weight: 201.22

Main Content: ≥95%

Quality Standard: GB/T537-2009

CAS No.: 1330-43-4

HS Code: 2840110000

Product Features

Anhydrous borax appears as white crystals or colorless glassy crystals.The α-orthorhombic crystal has a melting point of 742.5℃ and a density of 2.28 g/cm³;the β-orthorhombic crystal has a melting point of 664℃ and a density of 2.75 g/cm³. It has strong hygroscopicity, is soluble in water and glycerol, and slowly soluble in methanol to form a solution with a concentration of 13–16%. Its aqueous solution is weakly alkaline, and it is insoluble in ethanol. Anhydrous borax is the anhydrous substance obtained by heating borax at 350～400℃. When exposed to air, it absorbs moisture and converts into decahydrate borax or pentahydrate borax.

Technical Indicators

Application Scope

▶ It serves as a carrier for lubricants in metal wire drawing, and acts as a stabilizer and framework forming agent in refractory materials.

▶ Applied in high-quality glass, glaze, welding flux, and as a flux for non-ferrous metals and alloys.

▶ Used as a retarder for cement and concrete, a pH buffer in water systems, and an emulsifier for paraffin wax.

▶ Borax is a basic raw material for preparing boron-containing compounds; almost all boron compounds can be produced from borax.

▶ Its other properties are similar to those of ordinary borax.