Molekula
Sodium metasilicate pentahydrate
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 pentahydrate is an inorganic salt composed of sodium, silicon, and oxygen, commonly used as a cleaning agent, water softener, and pH adjuster in industrial and household applications, including detergents, pulp and paper processing, and corrosion inhibition. It is also employed in boiler water treatment and as a deflocculant in ceramics. This chemical has a CAS number of 10213-79-3, with the molecular formula Na2SiO3·5H2O and a molecular weight of 212.14 g/mol. It is stored at ambient conditions but requires careful handling due to its **Danger** classification under GHS. Molekula supplies sodium metasilicate pentahydrate 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 |
|---|---|
| Density | 0.850 - 1.050g/cm3 |
| Na2O | 28.10 - 29.5% |
| Dry matter | 56.5 - 58.5% |
| Molar ratio | 1.01 - 1.05 |
| Weight ratio | 0.98 - 1.02 |
| Silicon Dioxide (SiO2) | 28 - 29.4% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 89966263 |
| CAS Number | 10213-79-3 |
| IUPAC Name | disodium;dioxido(oxo)silane;pentahydrate |
| Molecular Formula | Na2SiO3 · 5H2O |
| Molecular Weight | 212.14 |
| Exact Mass | 211.994 |
| SMILES | O.O.O.O.O.[O-][Si](=O)[O-].[Na+].[Na+] |
| InChIKey | ADPGKKZKGXANON-UHFFFAOYSA-N |
| InChI | InChI=1S/2Na.O3Si.5H2O/c;;1-4(2)3;;;;;/h;;;5*1H2/q2*+1;-2;;;;; |
| PubChem CID | 61495 |
| UN Number | UN3253 |
| REACH Code | Y110 |
| 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
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P310 Immediately call a POISON CENTER or doctor/physician
Documents
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
- DISODIUM METASILICATE PENTAHYDRATE
- disodium;bis(oxidanidyl)-oxidanylidene-silane;pentahydrate
- disodium;dioxido(oxo)silane;pentahydrate
- H10Na2O8Si
- Silicic acid (H2SiO3), disodium salt, pentahydrate
- Silicic acid, disodium salt, pentahydrate
- SODIUM METASILICATE 5H2O
- Sodium oxosilanebis(olate)--water (2/1/5)
Frequently asked questions
What is sodium metasilicate pentahydrate commonly used for?
It is primarily used in detergents, water treatment (as a scale inhibitor and pH adjuster), and as a cleaning agent in industrial and household applications.
What is the chemical formula and molecular weight of sodium metasilicate pentahydrate?
The formula is **Na₂SiO₃·5H₂O**, and the molecular weight is **212.14 g/mol**.
What safety classification does sodium metasilicate pentahydrate have?
It is classified with the **Signal Word 'Danger'** due to its corrosive and hazardous properties.
How should sodium metasilicate pentahydrate be stored?
Store in a **cool, dry place at ambient temperature**, away from incompatible substances like acids and moisture.
Does Molekula supply sodium metasilicate pentahydrate in bulk quantities?
Yes, we offer bulk packaging options for sodium metasilicate pentahydrate—contact us for specific quantities and logistics.
What documentation is provided with an order of sodium metasilicate pentahydrate?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a packing list.
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.