Octadecyltrichlorosilane

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]

Octadecyltrichlorosilane
Names
Preferred IUPAC name
Trichloro(octadecyl)silane
Other names
Trichlorooctadecylsilane
Stearyltrichlorosilane
Identifiers
3D model (JSmol)
Abbreviations ODTS
ChemSpider
ECHA InfoCard 100.003.573
EC Number
  • 203-930-7
UNII
  • 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 diamond
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).
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Infobox references

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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