Description

Sodiumhydrogendisilicate CAS NO 26482-69-9 is an inorganic silicate compound of significant industrial importance. It serves as a versatile intermediate and functional additive in various manufacturing processes, valued for its specific chemical reactivity and structural properties. This product is essential for industries including detergents, ceramics, and construction materials, where it acts as a binder, stabilizer, or source of reactive silica.

Application

• Detergent and Cleaning Formulations: Acts as a builder and water softener, enhancing cleaning efficiency by sequestering hardness ions.
• Ceramic and Glass Production: Used as a fluxing agent and raw material component to modify melting points and improve product durability.
• Construction Materials: Incorporated into cements, plasters, and refractory products as a setting regulator and strength enhancer.
• Adhesives and Sealants: Functions as a filler and rheology modifier to control viscosity and improve bonding properties.
• Metal Surface Treatment: Employed in coatings and anti-corrosion formulations for surface passivation.
• Paper Manufacturing: Utilized as a retention aid and coating pigment to improve paper quality and printability.
• Catalyst and Catalyst Support: Serves as a base material or component in the synthesis of various industrial catalysts.

Basic Information

Product Name	Sodiumhydrogendisilicate
CAS No.	26482-69-9
Molecular Formula	NaHSi2O5 • xH2O
Molecular Weight	164.08 g/mol (anhydrous basis)
Synonyms	Sodium disilicate, acid; Sodium hydrogen disilicate; Disilicic acid, sodium salt; Sodium silicate (1:2:1); Sodium polysilicate; Water glass (acidic form); Silicate of soda; Sodium metasilicate polymer
EINECS	247-739-8

Quality Control

Our Sodiumhydrogendisilicate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistency and compliance with agreed specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and quality assurance for our global B2B clients.

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 each use to prevent moisture absorption and caking. Keep away from incompatible materials such as strong acids.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (as NaHSi2O5)	≥ 95.0 %
Loss on Drying	≤ 5.0 %
pH (5% solution)	10.0 - 12.0
Silicon Dioxide (SiO2) Content	Contact for details
Sodium Oxide (Na2O) Content	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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