104817

Trichloro(octadecyl)silane

≥90%

• Synonym(s): Octadecyltrichlorosilane
• Linear Formula: CH₃(CH₂)₁₇SiCl₃
• CAS Number: 112-04-9
• Molecular Weight: 387.93
• Beilstein/REAXYS Number: 1778847
• EC Number: 203-930-7
• MDL number: MFCD00000484
• UNSPSC Code: 12352103
• PubChem Substance ID: 24846677
• NACRES: NA.23

Properties

• vapor density: >1 (vs air)
• vapor pressure: <5 mmHg ( 20 °C)
• assay: ≥90%
• refractive index: n20/D 1.459 (lit.)
• bp: 223 °C/10 mmHg (lit.)
• density: 0.984 g/mL at 25 °C (lit.)
• SMILES string: CCCCCCCCCCCCCCCCCC[Si](Cl)(Cl)Cl
• InChI: 1S/C18H37Cl3Si/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(19,20)21/h2-18H2,1H3
• InChI key: PYJJCSYBSYXGQQ-UHFFFAOYSA-N

Description

General description

Self-assembled monolayers (SAMs) are used as passivating layers and for controlled modification of surface properties of substrates. Their main applications include wetting, adhesion, friction, chemical sensing and ultra-fine scale lithography. Alkytrichlorosilanes are commonly used for synthesising SAMs on Silicon dioxide which are commonly used in microelectronics. Trichloro(octadecyl)silane is a widely used alkyltrichlorosilane.

Trichloro(octadecyl)silane (OTS) is an alkoxy silane with a large alkyl and polar head group, mainly used as a self-assembled monolayer (SAM) on a variety of nanoparticles and metal oxides substrates. It provides an amphiphilic character that can be used in molecular and opto-electronics applications.

Application

OTS can be used to silanize poly(vinylalcohol) (PVA)/nanosilica (SiO₂) nanofibers that can provide a hydrophobic coating on the wooden surfaces by electrospinning. It can also be used as a SAM on the surface of silica (SiO₂) gate dielectric for the development of organic field effect transistor (OFETs). It may also be used in a variety of applications like improving the electrochemical performance for dye sensitized solar cells and for the development of metal insulated field effect transistors.

Safety Information

• pictograms: GHS05
• signalword: Danger
• hcodes: H314
• pcodes: P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363 - P405
• Hazard Classifications: Eye Dam. 1 - Skin Corr. 1B
• Storage Class: 8A - Combustible corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: 404.6 °F - closed cup
• flash_point_c: 207 °C - closed cup
• ppe: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter