Description

Hexasodium Diorthosilicate is a highly alkaline, inorganic silicate compound. It serves as a versatile and effective source of soluble silica and alkalinity in a range of industrial processes. This product is essential for manufacturers in the detergent, water treatment, and construction chemical industries seeking a stable and reactive silicate component.

Application

• Detergent & Cleaning Formulations: Acts as a potent builder and corrosion inhibitor in industrial and institutional cleaning products, enhancing cleaning efficiency and protecting equipment.
• Water Treatment: Used as a scale inhibitor and dispersant in boiler water and cooling tower systems to control silica and mineral deposits.
• Construction Chemicals: Functions as an accelerator and binder in specialty cements, grouts, and refractory materials.
• Pulp & Paper Processing: Employed in bleaching and deinking processes for pulp, and as a retention aid in papermaking.
• Metal Surface Treatment: Used in metal cleaning and finishing processes, including derusting and as a component in conversion coatings.
• Ceramics & Glass Manufacturing: Serves as a flux and source of silica in the production of ceramics, enamels, and specialty glasses.
• Textile Processing: Acts as a stabilizer for hydrogen peroxide in bleaching baths and as a weighting agent for fabrics.

Basic Information

Product Name	Hexasodium Diorthosilicate
CAS No.	15593-82-5
Molecular Formula	Na6O7Si2
Molecular Weight	306.11 g/mol
Synonyms	Sodium Orthosilicate, Sodium Metasilicate (anhydrous), Disodium Metasilicate, Sodium Silicate (alkaline grade), Water Glass (solid), Silicic Acid, Hexasodium Salt, Tetrasodium Pyrosilicate, Na-Silicate
EINECS	239-671-3

Quality Control

Our Hexasodium Diorthosilicate is manufactured under a stringent 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 consistency and compliance with your process requirements.

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). This material is hygroscopic (moisture-sensitive) and strong alkali; containers must be kept tightly sealed to prevent absorption of atmospheric moisture and carbon dioxide, which can degrade product quality. Store away from incompatible materials such as strong acids.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Identification (IR)	Conforms
Assay (as Na6O7Si2)	≥ 98.0 %
Silicon Dioxide (SiO2) Content	Contact for details
Sodium Oxide (Na2O) Content	Contact for details
Loss on Drying	≤ 2.0 %
Water Insoluble Matter	≤ 0.5 %
pH (1% Solution)	12.0 - 13.5

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