A highly concentrated source of boric oxide for glazes. Anhydrous borax is made by burning or fusing hydrated borax. It thus contains little or no water of crystallization and does not rehydrate under normal storage conditions. Anhydrous borax is water soluble, but considerably less so than raw borax (in aqueous solution it can provide slow release of boron).

This material does not puff or swell during melting (minimizing loss of powder in kilns with strong drafts), and melts easier (the swelling in other forms can create a porous state with an insulation factor that slows melting). Anhydrous borax is an excellent glass former, it does not puff or swell during melting thus fewer production problems result.

Used in agriculture, fertilizer, glass, enamel, ceramics, wood preservation, mining, refining：
• As the carrier of lubricant in metal wire drawing, it is used as stabilizer and skeleton in refractory materials.
• It is used as a cosolvent for high-quality glass, glaze flux, welding flux, non-ferrous metals and alloys.
• It is used as retarder for cement and concrete, pH buffer in water system and emulsifier for paraffin.
• Anhydrous borax is the basic raw material for preparing boron containing compounds. Almost all boron containing compounds can be producedby borax.