Molekula
Sodium metasilicate anhydrous
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 metasilicate anhydrous is an inorganic salt composed of sodium and silicate, widely used in detergents, water treatment, and industrial cleaning agents for its strong alkaline and buffering properties. It is also employed in textile processing, paper manufacturing, and as a corrosion inhibitor. This white, crystalline powder has a CAS number of 6834-92-0, a molecular formula of Na2SiO3, and a molecular weight of 122.06 g/mol. It is stored at ambient conditions but requires careful handling due to its hazardous nature, as indicated by its "Danger" signal word. Molekula supplies sodium metasilicate anhydrous 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Specifications
| Property | Value |
|---|---|
| Appearance | White, uniform, beaded |
| Bulk density | 1.05-1.35 g/cm3 |
| Whiteness | ≥85% |
| Na2O | 50.0-52.0% |
| Water insoluble matter | ≤0.25% |
| Iron (Fe) | ≤200ppm |
| pH (1% aq. sol.) | 12-13 |
| Particle Size（18-60mesh） | ≤93.0% |
| Silicon Dioxide (SiO2) | ≥45.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless monoclinic crystals |
| Melting Point | 1089 °C |
| Boiling Point | 102 °C at 760 mmHg |
| Density | 1.4 (relative, water = 1) |
| Solubility (other solvents) | Very sol in cold & hot water; soluble in dilute sodium hydroxide; insoluble in alcohol, acids (nonahydrate) |
| Vapour Pressure | 18 mmHg |
| Refractive Index | 1.520 |
Source: PubChem CID 23266 (HSDB, PAC Chemical Database, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 12948296 |
| CAS Number | 6834-92-0 |
| IUPAC Name | disodium;dioxido(oxo)silane |
| EC Number | 229-912-9 |
| Molecular Formula | Na2SiO3 |
| Molecular Weight | 122.06 |
| 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 | UN3253 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28391100 |
| Tariff Code | 2839110000 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
Hazard statements
- H290 May be corrosive to metals
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P234 Keep only in original container
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- 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, Russian, 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 metasilicate anhydrous commonly used for?
Sodium metasilicate anhydrous is primarily used in detergents, water treatment, pH buffering, and as a cleaning agent in industrial and household applications.
What is the chemical formula and molecular weight of sodium metasilicate anhydrous?
The chemical formula is **Na₂SiO₃**, and the molecular weight is **122.06 g/mol**.
What safety classification does sodium metasilicate anhydrous have?
It carries a **Signal Word: Danger** and requires careful handling due to its corrosive and irritant properties.
How should sodium metasilicate anhydrous be stored?
Store in a **cool, dry place at ambient temperature**, ensuring the container is tightly sealed and protected from moisture.
Does Molekula supply sodium metasilicate anhydrous in bulk quantities?
Yes, Molekula can supply sodium metasilicate anhydrous in **bulk quantities**—please contact us for specific packaging options and minimum order quantities.
What documentation comes with an order of sodium metasilicate anhydrous?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet for quality assurance.
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.