Description

Boraxpenta.99.5%(Tech.) is a high-purity technical grade of sodium tetraborate pentahydrate, a versatile inorganic salt. This product is engineered to deliver consistent performance and reliable quality for demanding industrial processes. It is a critical raw material for manufacturers in the glass, ceramics, metallurgy, and agricultural sectors, where its properties as a flux, buffer, and source of boron are essential.

Application

• Glass & Ceramics Manufacturing: Acts as a primary flux to lower melting temperatures and improve the thermal and chemical resistance of borosilicate glass, fiberglass, and ceramic glazes.
• Metallurgy & Metalworking: Used as a flux in welding and soldering, and as a component in metal refining and heat treatment salts to remove surface oxides.
• Agricultural Micronutrient: Serves as a source of soluble boron in fertilizers and soil amendments to correct boron deficiencies in crops.
• Detergent & Cleaning Formulations: Functions as a water softener, pH buffer, and bleaching aid in industrial and household cleaning products.
• Wood Preservation: Employed as a fungicidal and insecticidal agent in treatments for lumber and timber.
• Flame Retardants: Used as an additive in cellulose insulation, plastics, and textiles to impart flame-retardant properties.
• Adhesives & Starches: Acts as a cross-linking agent and viscosity modifier in adhesive and starch-based formulations.

Basic Information

Product Name	Boraxpenta.99.5%(Tech.)
CAS No.	11130-12-4
Molecular Formula	Na2B4O7·5H2O
Molecular Weight	291.29 g/mol
Synonyms	Sodium Tetraborate Pentahydrate; Borax 5 Hydrate; Disodium Tetraborate Pentahydrate; Sodium Borate Pentahydrate; Boric Acid (H2B4O7), Disodium Salt, Pentahydrate; Tincal; 99.5% Technical Grade Borax
EINECS	215-540-4

Quality Control

Our Boraxpenta.99.5%(Tech.) is manufactured under a stringent quality management system to ensure batch-to-batch consistency and compliance with industrial specifications. Every lot is tested against key parameters, including assay, heavy metal content, and loss on drying. A Certificate of Analysis (COA) documenting these results is provided with each shipment to guarantee product integrity for your processes.

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); keep the container tightly sealed when not in use to prevent caking due to moisture absorption. Keep away from strong acids.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (Na2B4O7·5H2O)	≥ 99.5 %
Loss on Drying	30.0 - 33.0 %
pH (1% Solution)	9.0 - 9.5
Water Insoluble Matter	≤ 0.05 %
Sulfate (SO4)	≤ 0.05 %
Chloride (Cl)	≤ 0.05 %
Heavy Metals (as Pb)	≤ 10 ppm
Iron (Fe)	≤ 10 ppm

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