Technical Grade White Granular Borax Pentahydrate, CAS 12179-04-3 ETiBOR-48 Disodium Tetraborate Pentahydrate for Glass Making
1. Borax Pentahydrate Introduction
Borax pentahydrate, also known as disodium tetraborate pentahydrate, is a crystalline form of borax composed of sodium, boron, oxygen, and water molecules. It is chemical formula is Na2B4O7.5H2O. Borax pentahydrate boron content is about 15% and boron oxide content is more than 48%. Borax Pentahydrate is commonly used in various industrial and household applications due to its unique properties. It is known for its role as a cleaning agent, as a flux in welding, as a buffering agent in chemical laboratories, and even as a component in some cosmetics and pharmaceuticals. Its ability to dissolve in water and form alkaline solutions makes it versatile for a range of uses. With its distinctive properties and wide-ranging applications, borax pentahydrate plays a significant role in numerous industries and daily activities.
Borax Pentahydrate Parameters | Product Name | Technical Grade White Granular Borax Pentahydrate |
| Cas No. | 12179-04-3 |
| Einecs No | 215-540-4 |
| Formula | Na2B4O. 5H2O |
| M.W | 291.35 |
| Density | 1.815g/cm3 |
| HS Code | 2840190000 |
| Package | 25kgs / 1200KGS PP Bags |
| Application | glass making |
2. Borax Pentahydrate Specifications
White Granular Borax Pentahydrate Na2B4O7.5H2O | Component | Content |
| B2O3 | 48.00-49.35% |
| Na2B4O7.5H2O | 100.42-103.24% |
| Na2O | 21.37-21.95% |
| SO4 | 135ppm max |
| Cl | 70ppm max |
| Fe | 3ppm max |
| Insolubles in water | 150ppm max |
| Particle size specifications |
| Size | Content |
| +1.180mm | 4.00% max |
| -0.075mm | 5.00% max |
3. Borax Pentahydrate Functions in Glass Making
Borax pentahydrate is a source of boric oxide (B2O3) for many products, including insulation fiber glass, textile fiber glass, and borosilicate glasses. Borax pentahydrate also provides a source of sodium and is used in combination with boric acid when it is necessary to control the sodium to boron ratio in glass.
Borax pentahydrate controls glassmaking melt and influences the final product properties. In fiber glass, borax pentahydrate assists fiberizing and gives durability in use while decreasing thermal emissivity. In borosilicate glass, borax pentahydrate gives a low coefficient of thermal expansion (thus providing resistance to heat and thermal shock) and improves chemical durability.
In the realm of glass making, borax pentahydrate serves as a crucial ingredient due to its unique properties that enhance the manufacturing process and the quality of the final product.
1. Improving UV transmittance: Borax pentahydrate can enhance the UV transmittance of glass, which is particularly important for situations that require high transparency and UV filtering.
2. Improving Transparency: Glass made with borax pentahydrate has higher transparency and is suitable for various optical applications.
3. Enhanced heat resistance: Borax pentahydrate can improve the heat resistance of glass, allowing it to maintain excellent physical and chemical properties even in high temperature environments.
Borax pentahydrate is widely used in glass making. It can be used to manufacture special glass such as optical glass, heat-resistant glass, and corrosion-resistant glass, etc.
4. Borax Pentahydrate Pictures
5. Packing and Shipping
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Technical Grade White Granular Borax Pentahydrate CAS 12179-04-3 ETiBOR-48 Disodium Tetraborate Pentahydrate For Glass Making Images
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