Description

Sodium Tetraborate Pentahydrate is a hydrated inorganic salt of boric acid, widely recognized for its role as a versatile source of borate ions. This compound is essential in numerous industrial processes due to its buffering capacity, flame-retardant properties, and ability to form complexes with various metal ions. It is a critical raw material for manufacturers in the glass and ceramics, agriculture, metallurgy, and detergent industries, where consistent quality and reliable supply are paramount.

Application

• Glass & Ceramics Manufacturing: A key fluxing agent to lower melting temperatures and improve the thermal and chemical durability of glass, fiberglass, and ceramic glazes.
• Agricultural Micronutrient: Used in fertilizers and soil amendments to correct boron deficiency in crops, which is crucial for cell wall formation and reproductive development.
• Metallurgy & Metalworking: Serves as a flux in welding and soldering to remove metal oxides, and as a component in protective coatings and slag conditioners.
• Detergents & Cleaning Agents: Functions as a water softener, pH buffer, and bleaching agent stabilizer in laundry and cleaning formulations.
• Flame Retardants: Incorporated into cellulose insulation, plastics, and textiles to suppress combustion and reduce smoke generation.
• Wood Preservation: Acts as an effective fungicide and insecticide in pressure-treated lumber to prevent decay.
• Adhesives & Binders: Used in starch-based adhesives and as a cross-linking agent to improve wet strength and viscosity.

Basic Information

Product Name	Sodium Tetraborate Pentahydrate
CAS No.	12045-88-4
Molecular Formula	Na2B4O7·5H2O
Molecular Weight	291.29 g/mol
Synonyms	Borax pentahydrate; Disodium tetraborate pentahydrate; Sodium borate pentahydrate; Boric acid (H2B4O7), disodium salt, pentahydrate; Tincal; Neobor®; Borax 5 Mol
EINECS	234-541-0

Quality Control

Our Sodium Tetraborate Pentahydrate is produced under a stringent quality management system. Each batch is tested to ensure it meets precise chemical and physical specifications, including assay, heavy metal limits, and clarity of solution. Certificates of Analysis (COA) documenting purity and compliance with relevant industrial standards are available for every shipment to guarantee traceability and product integrity.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in original packaging or a moisture-proof container to prevent caking and degradation. Keep away from incompatible materials such as strong acids.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (Na2B4O7·5H2O)	≥ 99.0 %
pH (1% Solution)	9.0 - 9.5
Loss on Drying	29.0 - 31.0 %
Water Insoluble Matter	≤ 0.05 %
Sulfate (SO4)	≤ 0.05 %
Chloride (Cl)	≤ 0.05 %
Heavy Metals (as Pb)	≤ 10 ppm
Iron (Fe)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.