Ethyl Silicate

Title: Ethyl Silicate
CAS Registry Number: 78-10-4
CAS Name: Silicic acid tetraethyl ester
Additional Names: tetraethyl silicate
Molecular Formula: C8H20O4Si
Molecular Weight: 208.33
Percent Composition: C 46.12%, H 9.68%, O 30.72%, Si 13.48%
Line Formula: Si(OC2H5)4
Literature References: Prepn from abs alcohol and silicon tetrachloride: J. J. Ebelmen, Ann. 57, 319 (1846); A. W. Dearing, E. E. Reid, J. Am. Chem. Soc. 50, 3058 (1928); G. Sumrell, E. E. Ham, ibid. 78, 5573 (1956). Toxicological studies: H. F. Smyth, J. Seaton, J. Ind. Hyg. Toxicol. 22, 288 (1940); V. H. Rowe et al., ibid. 30, 332 (1948). Review: H. D. Cogan, C. A. Setterstrom, Ind. Eng. Chem. 39, 1364 (1947).
Properties: Colorless, flammable liquid. mp -77°. bp 165-166°. Flash point 125°F (52°C). d420 0.933; nD25 1.3818. Viscosity: 0.6 cP. Practically insol in water, and slowly dec by it. Miscible with alcohol.
Melting point: mp -77°
Boiling point: bp 165-166°
Flash point: Flash point 125°F (52°C)
Index of refraction: nD25 1.3818
Density: d420 0.933
CAUTION: Potential symptoms of overexposure are irritation of eyes and nose. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 142.
Use: In weatherproofing and hardening stone, arresting decay and disintegration; manuf weatherproof and acidproof mortars and cements. In the "lost wax" process for casting of high-melting alloys.
Ethyl Sulfate Ethyl Sulfide Ethyl Tartrate Ethyl Tartrate, Acid Ethyl tert-Butyl Ether