Sodium trisilicate
Sodium trisilicate (CAS: 1344-09-8), with the formula Na2O · 3SiO2 and a molecular weight of 242.23 g/mol, is an inorganic salt commonly supplied as a white powder. This essential chemical serves as a fundamental building block in various industrial and laboratory applications due to its alkaline and binding properties. It is frequently employed in detergents, cements, and as a precursor in chemical synthesis.
- IUPAC
- Sodium water glass
- Synonyms
- Sodium disilicateSodium silicate solution (Na2O b· 3SiO2)Silicic acid, disodium salt

Detergent Builder
Sodium trisilicate acts as a builder in detergents, enhancing cleaning efficacy by sequestering hard water ions and providing alkalinity. Its properties help to suspend dirt and prevent redeposition on fabrics.
Cement and Binder
It is utilised as a component in cements and binders, contributing to adhesive properties and setting characteristics in various industrial formulations. This makes it suitable for refractory cements and welding electrodes.
Chemical Synthesis
As a versatile inorganic salt, sodium trisilicate finds use as a reagent or precursor in the synthesis of other silica-based materials and speciality chemicals. It is a source of reactive silica in chemical processes.
Corrosion Inhibitor
Sodium trisilicate can function as a corrosion inhibitor, particularly in aqueous systems. It forms a protective layer on metal surfaces, helping to prevent degradation.
| Molecular weight | 242.23 |
|---|---|
| Linear formula | Na2O · 3SiO2 |
| Assay | ≥18% Na (as Na2O) basis≥60% Si (as SiO2) basis |
| Form | powder |
| Loss on drying | ≤20% loss on ignition, 800 °C |
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Water hazard class (WGK, DE) | 1 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Sodium Trisilicate used for?
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Sodium trisilicate is used in detergents, cements, binders, chemical synthesis, and as a corrosion inhibitor.
What is the CAS number and formula for Sodium Trisilicate?
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The CAS number for Sodium Trisilicate is 1344-09-8, and its formula is Na2O · 3SiO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Sodium Trisilicate with an assay of ≥18% Na (as Na2O) and ≥60% Si (as SiO2). Loss on ignition is ≤20% at 800 °C. TSS does not represent this product as USP, BP, or EP grade.
How should Sodium Trisilicate be handled safely?
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Handling requires appropriate personal protective equipment, including a dust mask (type N95 or P1/P3 respirator filter), eyeshields, face shields, and gloves to prevent irritation and inhalation of dust.
Is Sodium Trisilicate a controlled substance?
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The provided data does not indicate that Sodium Trisilicate is a controlled substance.
How is Sodium Trisilicate packed and shipped?
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Tech Serve Solutions exports fine chemicals globally. Specific packaging details for Sodium Trisilicate can be provided upon request.
How can I request a quote or sample of Sodium Trisilicate?
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To request a quote or sample of Sodium Trisilicate, please contact the TSS sales team through our website or by phone.
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