Boric Acid (CAS 10043-35-3)

Description

1. Product Overview
Boric Acid (also known as orthoboric acid) is an inorganic compound with the chemical formula H₃BO₃. This versatile white crystalline powder, with a smooth, greasy texture and no odor, is a critical raw material across numerous industries. With a CAS number 10043-35-3, our high-purity Boric Acid is manufactured to meet stringent quality standards, ensuring optimal performance in glass manufacturing, nuclear applications, ceramics, adhesives, and chemical synthesis.

2. Key Specifications

• Chemical Formula: H₃BO₃
• Molecular Weight: 61.83 g/mol
• CAS Number: 10043-35-3
• Appearance: White crystalline powder
• Purity: ≥99.5%
• Solubility: Soluble in water, glycerol, and alcohols
• pH: ~5.1 (in aqueous solution, weakly acidic)
• Elemental Composition: Boron (B, 17.48%), Hydrogen (H, 4.89%), Oxygen (O, 77.63%)

3. Industrial Applications
1. Glass and Fiberglass Manufacturing

• Enhances heat resistance, transparency, and mechanical strength of glass products
• Shortens melting time and improves workability
• Critical for producing optical glass, acid-resistant glass, borosilicate glass, and fiberglass
• Acts as a flux and network former, reducing viscosity and controlling thermal expansion

2. Nuclear Industry

• Boric Acid is enriched with Boron-10 isotope (high thermal neutron absorption cross-section)
• Used in nuclear reactor control rods, shielding, and safety systems
• Essential for radiation protection and nuclear waste vitrification

3. Ceramics and Enamels

• Reduces thermal expansion and curing temperature of glazes
• Prevents cracking and improves gloss, durability, and wear resistance
• Key component in lead-free glazes and fast-fire tile production

4. Flame Retardancy

• Impregnated into cellulose insulation, wood, and textiles to reduce flammability
• Cross-links hydroxyl groups, promoting char formation and suppressing combustion

5. Adhesives and Chemical Synthesis

• Serves as a cross-linking agent in corrugated paper adhesives, protein glues, and dextrin-based binders
• Catalyzes oxidation reactions in nylon production and stabilizes intermediates in fertilizer manufacturing

6. Laboratory and Analytical Use

• Prepares buffer solutions and culture media for haploid breeding
• Used as a reagent in spectroscopy, chromatography, and pH control

4. Synthesis and Quality
Boric Acid is synthesized via hydrolysis of boron trichloride (BCl₃) in sodium hydroxide:
BCl₃ + 3NaOH → H₃BO₃ + 3NaCl
Our production process ensures high yield and purity, with rigorous testing for consistency and compliance.

5. Packaging and Storage

• Available in 25 kg bags, 1-ton pallets, and custom quantities
• Store in a cool, dry place away from moisture and incompatible materials (strong bases, metals)
• Shelf-stable under recommended conditions

6. Safety and Handling

• GHS Classification: Eye irritation (Category 2B), Reproductive toxicity (Category 1B)
• Use personal protective equipment (PPE): gloves, goggles, and lab coat
• Avoid inhalation and direct contact
• Dispose of in accordance with local regulations