SID 4558.0 2-(diphenylphosphino)ethyltriethoxysilane 18586-39-5 Gelest Adhesion Promoters >> Organofunctional silane ADHESIVE SEALANT 2-(diphenylphosphino)ethyltriethoxysilane. Used as adhesion promoter for gold substrates in microelectronic applications. Reacts slowly with water and moisture. 2-(diphenylphosphino)ethyltriethoxysilane. Used as adhesion promoter for gold substrates in microelectronic applications. Reacts slowly with water / moisture.