Tetraethyl orthosilicate
Chemical compound
Tetraethyl orthosilicate
Tetraethyl orthosilicate, formally named tetraethoxysilane (TEOS) or ethyl silicate is an organic compound with the formula Si(OCH2CH3)4. TEOS is a colorless liquid. It degrades in water. TEOS is the ethyl ester of orthosilicic acid, Si(OH)4. It is the most prevalent alkoxide of silicon. TEOS is a tetrahedral molecule at Si atom. Like its many analogues, it is prepared by alcoholysis of silicon tetrachloride: SiCl4 + 4 CH3CH2OH → Si(OCH2CH3)4 + 4 HCl
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