Sodium Tetraborate Decahydrate(CAS 1303-96-4)
UN No.:
UN 1458
| Purity | Grade | Package | Stock | Price | Quantity |
| 99.99% | Extra Pure | 25G | In Stock | 3 USD
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| 99.99% | Extra Pure | 100G | In Stock | 3 USD
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| 99.99% | Extra Pure | 500G | In Stock | 5 USD
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| 99.99% | Extra Pure | 2.5KG | In Stock | 23 USD
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| 99.99% | Extra Pure | 25KG | In Stock | 148 USD
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Applications of 1303-96-4
| Industry | Application | Process |
|---|---|---|
| Glass & Ceramics | Acts as a flux to lower melting temperature and improve glass clarity and gloss | Borax is added during glass melting to promote raw material fusion and reduce bubble formation; in glazes, it supplies boron to enhance thermal stability and chemical durability |
| Cleaning Products | Used as a multifunctional cleaner, detergent, and water softener | Upon dissolution in water, it forms an alkaline solution that emulsifies oils, removes stains, and sequesters calcium and magnesium ions to prevent scale formation |
| Agriculture | Serves as a micronutrient fertilizer to supplement soil boron | Borax is dissolved in irrigation water or applied directly to soil to supply bioavailable boron for plant uptake, preventing boron deficiency disorders (e.g., flower abortion, stem cracking) |
| Metallurgy | Applied as a flux in metal welding and brazing | At elevated temperatures, it reacts with metal oxides to form low-melting-point borosilicate slags, removing oxide layers and protecting metal surfaces |
| Flame-Retardant Materials | Incorporated into cellulose, wood, and plastics to enhance flame retardancy | Releases crystalline water upon heating to absorb heat and cool the substrate, while forming a glassy protective layer that inhibits oxygen diffusion |
| Chemical Synthesis | Serves as a raw material for producing other boron compounds (e.g., boric acid, sodium perborate) | Downstream boron chemicals are prepared via acidification, oxidation, or metathesis reactions |
| Pharmaceuticals & Preservation | Historically used for disinfection and preservation (now largely restricted) | Leverages its mild alkalinity and antimicrobial properties in ophthalmic solutions or topical washes (Note: toxic if ingested; banned for food and pharmaceutical use in most countries) |
| Nuclear Industry | Employed as a neutron absorber | Utilizes the high thermal neutron capture cross-section of boron-10 isotope in control rods or shielding materials to regulate nuclear reaction rates |
Physical and chemical properties of 1303-96-4
Boiling Point |
608 °F |
|---|---|
Decomposition |
When heated to decomposition it emits toxic fumes of /sodium oxide and boron/. |
Density |
1.73 |
Exact Mass |
382.086823 |
Exposure Limits |
ACGIH: TWA 2 mg/m3; STEL 6 mg/m3 NIOSH: TWA 5 mg/m3 |
Index of Refraction |
Index of refraction: 1.447 (alpha); 1.469 (beta); 1.472 (gamma) |
Melting Point |
167 °F |
Merck |
14,8590 |
Molecular Formula |
B4H20Na2O17 |
Molecular Weight |
381.37 |
Odor |
Odorless |
pH |
pH at 20 °C: 9.3 (0.1% solution); 9.2 (1.0% solution) |
pH Range |
9.2 |
PSA |
184.57000 |
Stability |
Stable. When heated above about 62 °C, borax loses water of crystallization, first forming the pentahydrate and then anhydrous sodium tetraborate. |
Storage condition |
2-8°C |
Vapour Pressure |
0 mmHg (approx) |
Water Solubility |
60 G/L (20 ºC) |
λmax |
λ: 260 nm Amax: 0.012 λ: 280 nm Amax: 0.010 |
Q&A for CAS 1303-96-4
1. How can I verify product quality?
Every batch of our Chemical Reagents is tested to meet ISO 9001 standards. We provide COA & NMR & SDS Provided with each shipment. Batch COA available for verification, and third-party retesting is supported. A full refund is offered if our data is incorrect.
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Yes. We support customization of Lab Grade purity, packaging size, and special testing requirements. Share your needs and we’ll provide a tailored solution.
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Yes. Batch COA available matches the actual shipment. COAs shown online are for reference or from previous batches.
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Download SDS of 1303-96-4
Pictograms |
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|---|---|
Signal Word |
Danger |
Hazard Statements |
H319 Causes serious eye irritation H360 May damage fertility or the unborn child |
Safety Data Sheet |
Download COA of 1303-96-4
Operate under the ISO 9001 system
