factory supply 99% sodium borate borax pentahydrate 1330-43-4 na2b4o7 borax

factory supply 99% sodium borate borax pentahydrate 1330-43-4 na2b4o7 borax

 Executive standard: Q/YTY005-2011

 Chemical name: Sodium tetraborate

 CAS RN: 1330-43-4

 1. Physical and chemical properties:

1.1 Molecular formula: Na₂B₄O₇

1.2 Molecular weight: 201.22

1.3 Structure formula:

1.4 Melting point: 742.5℃(for orthorhombic crystal A); 664℃(for orthorhombic crystal B)

1.5 Density: 2.28 (for orthorhombic crystal A); 2.75(for orthorhombic crystal B)

1.6 Properties: Its hygroscopicity is extremely strong. Dissolved in water, but slowly dissolved in methanol to form a concentration of 13-16% solution.

 2. Technical indexes:

 
3. Application: Sodium Borate has been mainly used in the manufacturing high quality glass, optical glass, glaze of pottery and porcelain, glaze of enamel, detergent, bleaching agent, cleaning agents, flame retardant, rust inhibitor and caking agent. It could be also used as the carrier of the lubricant used in metal wiredrawing, the stabilizer of refractory material and skeleton former, the coated fluxing agent in metallurgy, the retarder of cement and concrete, the buffer of pH value in water system and emulsifier of paraffin.