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:
|
Item
|
1st grade
|
2nd grade
|
|
Sodium Borate content,%
|
≥98.0
|
≥96.0
|
|
Diboron trioxide,%
|
66-68
|
66-68
|
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.
4. Safety instructions: Toxic by ingestion, inhalation, eye and skin contact. Eye and skin contact can cause inflammation. Mouse, oral: LD50=1060mg/kg; rat, oral: LD50=1200mg/kg. Rubber gloves, respirator and eye protection must be used during operations in case of skin contact, eyes contact..
