Octadecyltrichlorosilane

Octadecyltrichlorosilane
Names
Preferred IUPAC name
Trichloro(octadecyl)silane
Other names
Trichlorooctadecylsilane
Stearyltrichlorosilane
Identifiers
  • 112-04-9 checkY
3D model (JSmol)
  • Interactive image
Abbreviations ODTS
ChemSpider
  • 7865 ☒N
ECHA InfoCard 100.003.573
EC Number
  • 203-930-7
  • 8157
UNII
  • 1QLE771PKE checkY
  • DTXSID50868051
  • 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 ☒N
    Key: PYJJCSYBSYXGQQ-UHFFFAOYSA-N ☒N
  • InChI=1/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
    Key: PYJJCSYBSYXGQQ-UHFFFAOYAA
  • CCCCCCCCCCCCCCCCCC[Si](Cl)(Cl)Cl
Properties
C18H37Cl3Si
Molar mass 387.93 g·mol−1
Appearance Colorless liquid
Density 0.984 g/mL, liquid
Boiling point 223 °C (433 °F; 496 K) at 10 Torr
Solubility organic solvents, decomp by amines and alcohols
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 flammable, corrosive
GHS labelling:[1]
GHS05: Corrosive
Danger
H314
P280, P305+P351+P338, P310
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuelInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazards (white): no code
3
2
2
Related compounds
Dodecyltrichlorosilane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Octadecyltrichlorosilane (ODTS or n-octadecyltrichlorosilane) is an organosilicon compound with the formula CH3(CH2)17SiCl3. A colorless liquid, it is used as a silanization agent to prepare hydrophobic stationary phase, for reversed-phase chromatography.[2]

It is also evaluated for forming self-assembled monolayers on silicon dioxide substrates. Its structural chemical formula is CH3(CH2)17SiCl3. 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.[3]

References

  1. ^ GHS: GESTIS 510649
  2. ^ Pape, Peter G. (2017). "Silylating Agents". Kirk-Othmer Encyclopedia of Chemical Technology. pp. 1–15. doi:10.1002/0471238961.1909122516011605.a01.pub3. ISBN 9780471238966.
  3. ^ XTECH, NIKKEI. "Sony Develops TFT Substrate Entirely Formed by Organic Materials". NIKKEI XTECH.
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