Hydrated silica
CAS 10279-57-9
EC 600-358-3
Formula H2O.xO2Si
MW 78.1 g/mol
Silicones & Silicates Personal Care & CosmeticsPlastics & PolymersPrinting & PackagingFood & NutritionRubber & Tire Rheology ModificationAntioxidant & StabilizerFoam Control
Description
Hydrated silica (CAS 10279-57-9) is an amorphous, water-containing form of silicon dioxide, commercially known under trade names such as Davisil, Celite, and Kieselguhr. It is distinct from anhydrous silica by its surface-bound hydroxyl groups, which govern its adsorptive and rheological behaviour across industrial applications.
In personal care formulations, hydrated silica functions as a mild abrasive and thickening agent in toothpastes and skin-care products, controlling texture through particle-level friction and viscosity build. In rubber compounding, it reinforces polymer matrices and replaces carbon black, improving wet-grip performance in tire treads through silanol-polymer bonding.
This material is supplied in tablet form (approximately 0.5 g per tablet) and falls under HS code 2811 22 00. It is subject to REACH registration and is available in food-contact and technical grades; buyers should confirm compliance with FCC or Ph.Eur. monographs depending on the intended application.
In personal care formulations, hydrated silica functions as a mild abrasive and thickening agent in toothpastes and skin-care products, controlling texture through particle-level friction and viscosity build. In rubber compounding, it reinforces polymer matrices and replaces carbon black, improving wet-grip performance in tire treads through silanol-polymer bonding.
This material is supplied in tablet form (approximately 0.5 g per tablet) and falls under HS code 2811 22 00. It is subject to REACH registration and is available in food-contact and technical grades; buyers should confirm compliance with FCC or Ph.Eur. monographs depending on the intended application.
Physical Properties
| Melting Point | 1610 °C(lit.) |
| Boiling Point | >100 °C(lit.) |
| Density | 2.6 g/mL at 25 °C(lit.) |
| Form | tablets (~0.5 g each) |
| Water Solubility | Insoluble in water. |
| Refractive Index | n 20/D 1.544(lit.) |
| pH | 3.0-8.0 (3.3% in water) |
Trade & Regulatory
| HS Code | 2811 22 00 |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 3 |
Other Names
H-MagadiiteSilica HydrateSANDSILEXsilicSILICASIO2/SIDAVISILBLUE GEL
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