Tetramethyl orthosilicate Other names: Tetramethyl silicate Tetramethoxysilane Silicic acid tetramethyl ester Formula: C4H12O4Si CAS: 681-84-5 Weight: 152,22 g/mol Boiling point: 121 °C Melting point: -2 °C Density: 1,023 g/cm3