Description

Sodium Disilicate n-Hydrate is a versatile inorganic salt widely utilized as a builder and source of active alkalinity in industrial formulations. Its primary value lies in its ability to sequester water hardness ions, enhance cleaning efficacy, and provide stable pH control. This makes it an essential component for manufacturers in the detergent, cleaning product, and water treatment industries seeking efficient and cost-effective chemical solutions.

Application

• Detergent & Cleaner Manufacturing: A key builder in powdered and liquid laundry detergents, dishwashing compounds, and industrial cleaners, where it enhances surfactant performance and softens water.
• Industrial & Institutional (I&I) Cleaning: Used in formulations for hard surface cleaners, degreasers, and metal cleaning solutions due to its grease-emulsifying and soil-suspending properties.
• Water Treatment: Acts as a precipitating agent and corrosion inhibitor in boiler water and cooling tower treatment programs.
• Pulp & Paper Industry: Employed in pulping and bleaching processes as a pH modifier and silicate source.
• Ceramics & Cement: Serves as a fluxing agent and binder in ceramic glazes and specialty cement formulations.
• Textile Processing: Used in scouring and bleaching baths to stabilize peroxides and control alkalinity.

Basic Information

Product Name	Sodium Disilicate n-Hydrate
CAS No.	13870-28-5
Molecular Formula	Na2Si2O5·nH2O
Molecular Weight	182.15 (anhydrous basis) + nH2O
Synonyms	Disodium disilicate hydrate; Sodium metasilicate, polymer; Sodium polysilicate; Sodium silicate (Na2Si2O5); Water glass (specific grades); Silicate of soda; Soluble glass; SS-20; SS-22; Sodium silicon oxide hydrate
EINECS	237-637-6

Quality Control

Our Sodium Disilicate n-Hydrate is manufactured under strict quality management protocols to ensure batch-to-batch consistency and performance. Production adheres to relevant industrial standards, with key parameters including active alkali content, silicate ratio (SiO2/Na2O), and bulk density being rigorously controlled. A comprehensive Certificate of Analysis (COA) detailing assay, physical properties, and impurity levels is provided with each shipment to guarantee product integrity for your application.

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 product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent caking and absorption of atmospheric moisture and carbon dioxide. Store away from strong acids.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Assay (as Na2Si2O5)	Min. 95.0%
Silicon Dioxide (SiO2) Content	55.0 - 60.0 %
Sodium Oxide (Na2O) Content	36.0 - 40.0 %
Ratio (SiO2/Na2O)	Approx. 2.0 ± 0.1
Loss on Drying	Contact for details
Bulk Density	Contact for details
pH (1% solution)	12.0 - 13.0

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