(1,1,3,3-Tetramethyl-1,3-disiloxanediyl)dimethanol 1,1'-Oxybis(dimethyl(hydroxymethyl)silane) 117675-68-0 27336-51-2 5833-59-0 EINECS 227-417-2 Methanol, (1,1,3,3-tetramethyl-1,3-disiloxanediyl)bis-