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- Einecs Number 201-083-8
- Synonyms TETRAETHYLORTHOSILICATE; TEOS
- HMIS 2-2-1-X
- Molecular Formula C8H20O4Si
- Molecular Weight (g/mol) 208.33
- TSCA Yes
- Autoignition Temp (˚C) 260
- Boiling Point (˚C/mmHg) 169
- Coefficient of Thermal Expansion (x10-4 K-1) 1.1 x 10-3
- Density (g/mL) 0.9335
- Dielectric Constant (F/m) 4.1
- Flash Point (˚C) 46 °C
- Melting Point (˚C) -77°
- Refractive Index @ 20˚C 1.3818
- Thermal Conductivity (W/m˚C, ˚C) 4.0
- Vapor Viscosity (µP,˚C) 60, 60
- Viscosity at 25 ˚C (cSt) 0.8
Source by hydrolysis of SiO2 and sol-gel derived glasses.1
Intermediate for silica spheres with controlled dimensions.2
1. Brinker, C. et al. Sol-Gel Science; Academic Press: 1990.
2. Stöber, W. et al. J. Coll. Interface Sci. 1968, 26, 62.