Octadecyltrimethoxysilane

Octadecyltrimethoxysilane (OTMS) is an organosilicon compound.

This colorless liquid is used for preparing hydrophobic coatings and self-assembled monolayers.

It is sensitive toward water, irreversibly degrading to a siloxane polymer.

[2] It places a C18H39SiO3 "cap" on oxide surfaces.

The formation of OTMS monolayers is used for converting hydrophilic surfaces to hydrophobic surfaces, e.g. for use in certain areas of nanotechnology and analytical chemistry.

2D model of octadecyltrimethoxysilane
2D model of octadecyltrimethoxysilane
NFPA 704 four-colored diamond Health 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroform Flammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oil Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code