Overview
Potassium silicate (CAS 1312-76-1 ), also known commercially as Kasil and listed as E560 , is an inorganic binder and film-forming agent produced by fusing silica with potassium carbonate.
It functions as a bonding agent, corrosion inhibitor, and biocide across construction, industrial, and agricultural applications. In construction, it is the active binder in silicate paints and mineral coatings.
It reacts with masonry substrates to form a permanent, non-film-forming bond that resists weathering and biological growth. Water treatment operations use it to passivate pipe surfaces and control corrosion.
By forming a protective silicate layer on metal infrastructure, it ensures longevity. Textile and paper processing employ it as a fixative and sizing agent, improving fiber bonding and surface strength during finishing.
In industrial cleaning and detergent formulations, it acts as a builder and alkaline buffer. This enhances soil removal and prevents redeposition on hard surfaces during the cleaning process.
Potassium silicate is supplied primarily as a clear to slightly hazy aqueous solution. The solids content and silica-to-potassium ratio (SiO₂:K₂O molar ratio) vary depending on the specific grade required.
Solid forms, including powder and cullet, are available for applications requiring dry blending or controlled dissolution. Technical and industrial grades are standard for most manufacturing needs.
Food-additive grade is available in compliance with E560 specifications. Our products meet rigorous quality benchmarks to ensure consistent performance across all industrial and commercial sectors.
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Physical Properties
| Melting Point | >300°C |
| Density | 1.203-1.209 g/cm³ @ Temp: 20 °C |
| Appearance | (Solid) Weight ratio Si O 2 :K 2 O varies with grade from 2.1:1 to 2.5:1; colorless anhydrous lump, shattered or granular. Soluble in water at high temperature and pressure; insoluble in alco- hol. (Solution) Colorless liquid, B′e range 29–48 degrees. |
| Color | White |
| Form | Powder |
| Water Solubility | Soluble in water. |
Safety & Handling
Danger GHS05 GHS07 Hazard Statements H290 H290 H314 H314 H315 H315 H318 H318 H319 H319 H335 H335 Precautionary Statements P234 P234 P260 P260 P261 P261 P264 P264 P271 P271 P280 P280 P316 P316 P317 P317 P319 P319 P321 P321 P363 P363 P390 P390 P405 P405 P406 P406 P501 P501 P264+P265 P264+P265 P302+P352 P302+P352 P304+P340 P304+P340 P332+P317 P332+P317 P337+P317 P337+P317 P362+P364 P362+P364 P403+P233 P403+P233 P301+P330+P331 P301+P330+P331 P302+P361+P354 P302+P361+P354 P305+P351+P338 P305+P351+P338 P305+P354+P338 P305+P354+P338
Trade & Regulatory
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 1312-76-1
- EC Number
- 215-199-1
- Mol. Weight
- -
- Category
- Silicones & Silicates