104817
Trichloro(octadecyl)silane
≥90%
Synonym(s):
Octadecyltrichlorosilane
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About This Item
Linear Formula:
CH3(CH2)17SiCl3
CAS Number:
Molecular Weight:
387.93
UNSPSC Code:
12352103
NACRES:
NA.23
PubChem Substance ID:
EC Number:
203-930-7
Beilstein/REAXYS Number:
1778847
MDL number:
vapor density
>1 (vs air)
Quality Segment
vapor pressure
<5 mmHg ( 20 °C)
assay
≥90%
refractive index
n
bp
223 °C/10 mmHg (lit.)
density
0.984 g/mL at 25 °C (lit.)
functional group
silyl
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
General description
Trichloro(octadecyl)silane (OTS) is a high-reactivity alkyltrichlorosilane engineered for the precise deposition of dense, hydrophobic Self-Assembled Monolayers (SAMs) on inorganic and metal oxide substrates.
Its amphiphilic structure, featuring a 18-carbon octadecyl chain and a highly polar trichlorosilyl head group, ensures rapid covalent bonding to surfaces like glass, silicon, and ceramics. This molecular architecture allows for the creation of thin insulating gates and non-polar interphases that effectively shield sensitive electronic components from water vapor and environmental degradation.
Widely recognized as a benchmark material in molecular electronics, OTS provides a terminal methyl handle for tuning the wetting, friction, and adhesion properties of substrates at an ultra-fine scale.
Refined to a ≥90% high-purity specification, this grade is optimized for consistency in research and industrial processes requiring reliable surface passivation and improved compatibility between organic and inorganic phases.
Its amphiphilic structure, featuring a 18-carbon octadecyl chain and a highly polar trichlorosilyl head group, ensures rapid covalent bonding to surfaces like glass, silicon, and ceramics. This molecular architecture allows for the creation of thin insulating gates and non-polar interphases that effectively shield sensitive electronic components from water vapor and environmental degradation.
Widely recognized as a benchmark material in molecular electronics, OTS provides a terminal methyl handle for tuning the wetting, friction, and adhesion properties of substrates at an ultra-fine scale.
Refined to a ≥90% high-purity specification, this grade is optimized for consistency in research and industrial processes requiring reliable surface passivation and improved compatibility between organic and inorganic phases.
Application
As a foundational molecular building block, OTS is critical for engineering ultra-thin, high-performance interfaces in flexible electronics and sensitive bio-diagnostic platforms.
High-Mobility Nanoelectronics: Primarily used to form Self-Assembled Monolayers (SAMs) on gate dielectrics in Organic Field-Effect Transistors (OFETs). It passivates the surface to reduce charge-trapping, significantly enhancing charge-carrier mobility in materials like pentacene and P3HT.
Graphene Device Optimization: Employed as a substrate modifier for graphene transistors to achieve low intrinsic doping and high carrier mobility on conventional substrates.
Precision Biosensing: Serves as a chemical sensor interface for immobilizing physiologically active cell organelles and proteins. Its long hydrophobic chain enables fine-scale lithography and chemical patterning essential for point-of-care diagnostic arrays.
Advanced Photovoltaics: Applied in dye-sensitized solar cells to improve electrochemical performance by controlling interface kinetics and reducing recombination.
Nanofiber Functionalization: Used to silanize electrospun nanofibers for the development of moisture-resistant, hydrophobic coatings in smart materials and environmental sensors.
High-Mobility Nanoelectronics: Primarily used to form Self-Assembled Monolayers (SAMs) on gate dielectrics in Organic Field-Effect Transistors (OFETs). It passivates the surface to reduce charge-trapping, significantly enhancing charge-carrier mobility in materials like pentacene and P3HT.
Graphene Device Optimization: Employed as a substrate modifier for graphene transistors to achieve low intrinsic doping and high carrier mobility on conventional substrates.
Precision Biosensing: Serves as a chemical sensor interface for immobilizing physiologically active cell organelles and proteins. Its long hydrophobic chain enables fine-scale lithography and chemical patterning essential for point-of-care diagnostic arrays.
Advanced Photovoltaics: Applied in dye-sensitized solar cells to improve electrochemical performance by controlling interface kinetics and reducing recombination.
Nanofiber Functionalization: Used to silanize electrospun nanofibers for the development of moisture-resistant, hydrophobic coatings in smart materials and environmental sensors.
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Signal Word
Danger
Hazard Codes
Precautionary Statements
Hazard Classifications
Eye Dam. 1 - Skin Corr. 1B
Storage Class
8A - Combustible corrosive hazardous materials
WGK
WGK 1
Flash Point (°F)
404.6 °F - closed cup
Flash Point (°C)
207 °C - closed cup
PPE (personal protective equipment)
Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
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