Molekula
Sodium silicate solution (water glass)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Sodium silicate solution, commonly called water glass, is a versatile inorganic compound used as a binder, adhesive, and corrosion inhibitor in industries like construction, ceramics, and detergents. Its alkaline properties make it ideal for pH regulation, water treatment, and even as a food additive (E550). This aqueous solution features a CAS number of 1344-09-8, molecular formula Na₂O₃Si (simplified as Na₂SiO₃), and an approximate molecular weight of 122.063 g/mol. It requires ambient storage but carries a **Danger** signal word due to its corrosive and hazardous nature. Molekula supplies sodium silicate solution from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 L — £30.90 per pack ex VAT · £37.08 inc. VAT
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100 mL — £20.00 per pack ex VAT · £24.00 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Liquid |
| Density | 1.368 - 1.394 |
| Assay | 39 - 41 |
| Water insoluble matter | ≤0.4% |
| Iron (Fe) | ≤0.05% |
| NaO2 | ≥8.2% |
| Modules | 3.1 - 3.4 |
| Silicon Dioxide (SiO2) | ≥26.0 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 43805315 |
| CAS Number | 1344-09-8 |
| IUPAC Name | disodium;dioxido(oxo)silane |
| EC Number | 229-912-9 |
| Molecular Formula | Na2O3Si |
| Molecular Weight | 122.063 |
| Exact Mass | 121.9412 |
| SMILES | [O-][Si](=O)[O-].[Na+].[Na+] |
| InChIKey | NTHWMYGWWRZVTN-UHFFFAOYSA-N |
| InChI | InChI=1S/2Na.O3Si/c;;1-4(2)3/q2*+1;-2 |
| PubChem CID | 23266 |
| UN Number | UN3266 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2839.11.0000 |
| Tariff Code | 2839190000 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
Hazard statements
- H290 May be corrosive to metals
- H302 Harmful if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H332 Harmful if inhaled
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P302+352 IF ON SKIN: Wash with soap and water
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Britesil
- Carsil
- Dryseq
- Sikalon
- Sodium sesquisilicate
- SODIUM SILICATE
- Sodium silicate glass
- Sodium siliconate
- Sodium water glass
- Waterglass
Frequently asked questions
What is sodium silicate solution commonly used for?
Sodium silicate solution (water glass) is widely used as a binder in foundry molds, a deflocculant in ceramics, a detergent builder, and in adhesives, sealants, and fire retardants.
What is the chemical formula and molecular weight of sodium silicate solution?
The simplified formula is **Na₂O₃Si** (often represented as **Na₂SiO₃**), with a molecular weight of **122.063 g/mol** (anhydrous).
How should sodium silicate solution be stored?
Store in a tightly sealed container at **ambient temperature**, away from moisture, incompatible materials (e.g., acids), and direct sunlight.
What grades or concentrations of sodium silicate solution does Molekula supply?
Molekula supplies **technical-grade sodium silicate solutions** in varying concentrations (typically **30–50% SiO₂**), customizable upon request.
Can Molekula supply sodium silicate solution in bulk quantities?
Yes, we offer **bulk packaging options** (e.g., IBC totes, drums) for industrial-scale applications—contact us for specific volume requirements.
What documentation is provided with a sodium silicate solution order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.