Octodecyltrimethoxysilane.
Synonym: Trimethoxyoctadecylsilane
Chemical Structure
Introduction
SiSiB® PC5881 is a long-chain alkyl silane, commonly called OTMS. It is easy to be dissolved in ordinary organic solvent, e.g. hydrocarbon, ether, ketone, etc. It is easy to be hydrolyzed and condensed, generate polysiloxane.
SiSiB® PC5881 is used for preparing hydrophobic coatings and self-assembled monolayers. It is sensitive toward water, irreversibly degrading to a siloxane polymer. 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.
Typical Physical Properties
| Chemical Name: | n-Octodecyltrimethoxysilane |
| CAS No.: | 3069-42-9 |
| EINECS No.: | 221-339-2 |
| Empirical Formula: | C21H46O3Si |
| Molecular Weight: | 374.68 |
| Boiling Point: | 150°C [2mmHg] |
| Flash Point: | 140°C |
| Color and Appearance: | Colorless transparent liquid |
| Density [25°C]: | 0.885 |
| Refractive Index [25°C]: | 1.4390 |
| Purity: | 95.0% by GC |
Applications
Coupling Agent
Mainly be used to deal with inorganic materials, e.g. glass, silica, Al2O3, Kaolin, pottery and porcelain, mica, SiC, talcum powder etc., in order to improve the property of blending with organic matter and water-proof, enhancing the mechanical property of the products.
Fog-proof Preparation of Glass
a) Protect blank glass and coated glass (optical antireflex coating, vacuum antireflex coating, reflective coating)
b) Protect optical parts or precision instrument with graduations and metal frames.
Protect Historical Relics or Other Products from Water
Protect historical relics (esp. outdoor historical relics) from corrosion, freeze or efflorescence.
Packings
Customized product packing is 100ml, 250ml, 500ml, 1L and 5L bottle. Industrialized product packing is 210L steel drum or 1000L IBC tote, for more details, please visit Packing Centre.