Description

Potassium Metaborate 4/3-Water is a specialized inorganic salt with the CAS registry number 162379-51-3. This compound serves as a versatile source of both potassium and borate ions, offering unique chemical properties for advanced industrial processes. It is a critical material for manufacturers in sectors requiring precise buffering, fluxing, or boron delivery. Key industries that utilize this product include glass and ceramics manufacturing, metallurgy, and specialty chemical synthesis.

Application

• Glass and Ceramics Production: Acts as a high-temperature flux and stabilizer, lowering melting points and improving the durability and optical properties of specialty glasses, enamels, and glazes.
• Metallurgical Flux: Used in welding and brazing applications to remove oxides and facilitate the flow of molten metal, ensuring strong, clean joints.
• Corrosion Inhibitor: Formulated into aqueous solutions for use in cooling water systems and antifreeze solutions to protect metal surfaces from degradation.
• Chemical Synthesis: Serves as a precursor or catalyst in the production of other boron-containing compounds and specialty chemicals.
• Buffer Solutions: Utilized in analytical chemistry and laboratory settings to prepare stable buffer solutions with specific alkaline pH ranges.
• Fire Retardant Additive: Incorporated into materials such as plastics, textiles, and wood treatments to enhance fire resistance.
• Agriculture (Micronutrient Source): Provides a soluble source of boron, an essential micronutrient, in specialized fertilizer formulations for crops with high boron requirements.

Basic Information

Product Name	Potassium Metaborate 4/3-Water
CAS No.	162379-51-3
Molecular Formula	KBO₂ · 4/3H₂O or K₂O·B₂O₃·(8/3)H₂O
Molecular Weight	~137.95 g/mol (anhydrous basis)
Synonyms	Potassium Borate Hydrate; Potassium Tetraborate Tetrahydrate (related compound); Dipotassium Tetraborate Octahydrate; Boron Potassium Oxide Hydrate; Potassium Metaborate Tetrahydrate (common alias); KB₅O₈·4H₂O (alternative representation); Boric Acid, Potassium Salt, Hydrate; Potash Borate
EINECS	Contact for details

Quality Control

Our Potassium Metaborate 4/3-Water is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can lead to caking or changes in assay.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (as KBO₂·4/3H₂O)	≥ 98.0 %
pH (5% solution)	9.0 - 11.0
Loss on Drying	≤ 2.0 %
Water Insoluble Matter	≤ 0.1 %
Chloride (Cl)	≤ 0.01 %
Sulfate (SO₄)	≤ 0.02 %
Heavy Metals (as Pb)	≤ 10 ppm

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