Sodium metasilicate 5AQ
General Product Information
| Article | Sodium metasilicate 5AQ |
| Synonyms | Sodium metasilicate pentahydrate |
| CAS No. | 10213-79-3 |
| EEG No. | – |
| EINECS No. | 229-912-9 |
| IMO | Class 8 (C) |
| Tariff Code | 28391100 |
| UN No. | 3253 |
| VLG/ADR | Class 8, Packing Group III |
Description
Sodium metasilicate 5AQ (pentahydrate) is an inorganic compound with strong basic properties. It is widely used in industrial processes because of its cleaning, degreasing and binding properties. It belongs to the family of sodium silicates. This pentahydrate is the most commonly used hydrate form because of its good solubility and practical processing characteristics .
Also available:
Sodium metasilicate 0AQ (Technical Grade),
Sodium metasilicate 9AQ (Technical Grade)
Characteristics
- Odor: Odorless.
- Hygroscopic: Yes.
- Color: White.
- Grade: Technical.
- Solubility: Highly soluble in water.
- Shape: Crystalline powder.
Physical & Chemical Properties
| Chemical Structure | Na2SiO3-5H2O |
| Molar Weight | Approx. 212.14 g/mol |
| Melting Point | Approx. 72°C (decomposes). |
| Boiling Point | – |
| Density | Approx. 1.68 g/cm³. |
| Refractive Index | – |
| pH | Approx. 12.6 (on 1% solution). |
Interessing Links
- CAS Common Chemistry – Sodium metasilicate pentahydrate
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- PubChem – Silicic acid (H2SiO3), disodium salt, pentahydrate – Chemical information by the National Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Sodium metasilicate
Applications
Sodium metasilicate 5AQ is applied in various ways, for instance:
1. Cleaning Agents
Sodium metasilicate 5AQ is widely used in degreasers, metal cleaners and cleaners for heavily soiled surfaces because of its emulsifying and dirt-binding properties.
2. Construction Industry
Used in cement hardeners, mortars and as a binder in refractory materials.
3. Water Treatment
As a corrosion inhibitor and dispersant in boiler water systems and cooling systems.
4. Paper Industry
Used as a buffering bleaching agent in chemical pulp treatment and as an adjuvant at process water.
5. Textile & Leather Industry
Used at degreasing and bleaching of textile fibers and preparation of leather.
6. Ceramics & Glass Production
Raw material in the production of technical ceramics, glazes and coatings.