1,3,5,7-TETRAMETHYL-1,1,3,5,7,7-HEXAPHENYLTETR* 1,3,5,7-Tetramethyl-1,1,3,5,7,7-hexaphenyltetrasiloxane 38421-40-8 EINECS 253-922-2 Tetrasiloxane, 1,3,5,7-tetramethyl-1,1,3,5,7,7-hexaphenyl-