Heptamethyltrisiloxane Other names: bis-(Trimethylsiloxy)-methylsilane 1,1,1,3,5,5,5-Heptamethyltrisiloxane Formula: C7H22O2Si3 CAS: 1873-88-7 Weight: 222,51 g/mol Boiling point: 142 °C Melting point: -20 °C Density: 0,819 g/cm3