Basic Information
1.Product Name:Sodium Tetraborate Decahydrate
2.Other Names:
Sodium tetraborate,decahydrate; Borax; Disodium tetraborate; Borax,medicinal; 2,4,6-trioxa-1,3,5,7-tetraboraheptane-3,5-diolate, 1,7-dioxo-, sodium salt, pentahydrate; disodium 1,3,5,7-tetrahydroxy-2,4,6,8,9-pentaoxa-3,7-dibora-1,5-diboranuidabicyclo[3.3.1]nonane octahydrate
3.Molecular Formula:H20B4Na2O17
4.HS No.:2840190000
5.CAS No.:1303-96-4
6.EINECS No.: 215-540-4
7.Purity:≥99.5%
8.Appearance:Colorless, translucent crystals or white crystalline powder
Physical and Chemical Properties
Appearance: White crystalline powder/colorless transparent crystals, odorless
• Density: 1.73 g/cm³, melting point 741°C (after dehydration), boiling point 1575°C (decomposition)
• Solubility: Freely soluble in water (aqueous solution is weakly alkaline, pH≈9.2-9.6), slightly soluble in ethanol, insoluble in acetone
• Properties: Stable at room temperature; readily loses crystalline water upon heating to form anhydrous borax; readily absorbs moisture and caking; exhibits chelating, fluxing, preservative, and flame-retardant properties; non-flammable and non-explosive; low toxicity; mildly irritating to skin and mucous membranes
Application
• Glass Manufacturing: A fluxing agent for photovoltaic glass, optical glass, and glass bottles/containers, lowering melting temperatures while enhancing glass transparency and heat resistance;
• Ceramics Industry: Firing aid for ceramic bodies and glaze brightener, optimizing sintering effects to enhance ceramic luster and hardness;
• Electroplating/Metal Processing: Electroplating chelating agent, stabilizing bath pH to improve uniformity and adhesion of nickel/copper/gold plating layers;
• Flame Retardants: Synergistic flame retardant when blended with boric acid for plastics, rubber, and textiles, enhancing fire resistance;
• Other Industries: Water treatment softener, adhesive curing agent, paper sizing agent, rubber vulcanization accelerator.
Storage
1. Store in a sealed container within a cool, dry, well-ventilated warehouse, away from humid environments (core protection against moisture absorption and caking). Maintain warehouse relative humidity below 60%.
2. Store separately from strong acids, oxidizing agents, and food-grade chemicals. Strictly prohibit mixed storage. Avoid contact with acids to prevent reactions that generate boric acid.
3. Use moisture-resistant packaging (laminated woven bags/ton bags + PE inner liner). Store elevated off the ground and walls (≥10cm clearance) to prevent dampness.
3.Store at ambient temperature without temperature control. Unopened shelf life: 12 months. Use promptly after opening and reseal immediately.
ABOUT US
We work in this field for about 16 years, and the annual output of SodiumTetraborate Decahydrate about 800,000 tons.
OUR ADVANTAGE
1.Quickly and timely response
2.Quick and professional Delivery of chemicals
3.Professional technical support and after-sales service
4.Full set of Hazard Chemical Exporting Licenses
5.Continuous and stable supply chemicals with professionally deal Bulk Vessel,ISO Tank and containers transportation
