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 where controlled release of borax or boric acid is required. It serves as a critical raw material for manufacturers in the glass, ceramic, agriculture, and detergent industries, providing key properties like fluxing, buffering, and micronutrient supply.

Application

• As a fluxing agent in the production of glass, enamel, and ceramics to lower melting points and improve product durability.
• As a micronutrient fertilizer and soil amendment in agriculture to correct boron deficiencies in crops.
• As a buffer and corrosion inhibitor in antifreeze formulations and metalworking fluids.
• As a fire retardant additive in cellulose insulation, plastics, and textiles.
• In the formulation of household and industrial cleaning products, including laundry detergents and disinfectants.
• As a precursor in the synthesis of other boron-based chemicals and specialty materials.
• In wood preservation treatments to protect against insect and fungal decay.

Basic Information

Product Name	Sodium Tetraborate Pentahydrate
CAS No.	12179-04-3
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; Borax 5-hydrate; Neobor®; 5 Mol borax; Tincalconite (mineral form)
EINECS	235-541-3

Quality Control

Our Sodium Tetraborate Pentahydrate is produced under a rigorous quality management system. Each batch is analyzed to ensure it meets precise chemical and physical specifications, including assay, heavy metal limits, and clarity of solution. We provide comprehensive Certificates of Analysis (COA) with every shipment to guarantee traceability and compliance with relevant industrial standards. Specifications can be aligned with technical or reagent-grade requirements.

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 - 9.6
Loss on Drying	29.0 - 31.0%
Water Insoluble Matter	≤ 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.