Octadecyltrichlorosilane
# Octadecyltrichlorosilane

Octadecyltrichlorosilane (ODTS or n-octadecyltrichlorosilane) is an organosilicon compound with the formula $CH_3(CH_2)_{17}SiCl_3.$ A colorless liquid, it is used as a silanization agent to prepare hydrophobic stationary phase, for reversed-phase chromatography.

It is also evaluated for forming self-assembled monolayers on silicon dioxide substrates. Its structural chemical formula is $CH_3(CH_2)_{17}SiCl_3.$ It is flammable and hydrolyzes readily with release of hydrogen chloride.

Dodecyltrichlorosilane, an ODTS analog with shorter alkyl chain, is used for the same purpose.

ODTS-PVP films are used in organic-substrate LCD displays.

