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Octadecyltrichlorosilane

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Origin: China

Cas No: 112-04-9

Specification: 99%min

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  • Products Specification
  • Product Description
  • Property

    CAS No.: 112-04-9 Formula: C18H37Cl3Si Molecular Weight: 387.93100

    Description

    Octadecyltrichlorosilane (ODTS, or n-octadecyltrichlorosilane) is an organometallic chemical. It is used in semiconductor industry to form self-assembled monolayer thin films on silicon dioxide substrates. Its structural chemical formula is CH3(CH2)17SiCl3. It is flammable, reacts with water, and is also sensitive to air. It is corrosive and can severely damage mucous membranes. Its EINECS number is 203-930-7.
    Octadecyltrichlorosilane is an amphiphilic molecule consisting of a long-chain alkyl group (C18H37–) and a polar head group (SiCl3–), which forms Self assembled monolayers (SAMs) on various oxidic substrates.
    ODTS finds its use in molecular electronics, as thin insulating gates in Metal-Insulator-Semiconductor Field-Effect Transistors.
    Dodecyltrichlorosilane, an ODTS analog with shorter alkyl chain, is used for the same purpose as well.
    ODTS-PVP films are used in organic-substrate LCD displays.

    Basic Info

    Chemical Name Octadecyltrichlorosilane
    Synonyms

    N-OCTADECYLTRICHLOROSILANE;
    Trichloro(octadecyl)silane;
    Trichlorostearylsilane;
    Stearyltrichlorosilane;
    Silane, trichlorooctadecyl-;
    Trichlorooctadecylsilane;

    CAS No. 112-04-9
    Molecular Formula C18H37Cl3Si
    Molecular Weight 387.93100
    PSA 0.00000
    LogP 8.90320

    Properties

    Appearance & Physical State Colorless clear liquid
    Density 0.984 g/mL at 25 °C(lit.)
    Boiling Point 223 °C10 mm Hg(lit.)
    Melting Point 22°C
    Flash Point 193 °F
    Refractive Index n20/D 1.459(lit.)
    Stability Stable. Reacts violently with water. Incompatible with strong acids, strong bases, strong oxidizing agents. Air-sensitive. Combustible.
    Vapor Density >1 (vs air)
    Vapor Pressure <5 mm Hg ( 20 °C)

    Safety Info

    RTECS VV4680000
    Hazard Class 8
    Safety Statements S26; S36/37/39; S43
    HS Code 2931900090
    WGK Germany 1
    Packing Group II
    RIDADR UN 1800 8/PG 2
    Risk Statements R14; R34; R29
    Hazard Codes C

    Synthesis Route

    1-ChlorooctadecaneOctadecyltrichlorosilane
    octadec-1-ene+TrichlorosilaneOctadecyltrichlorosilane
    octadec-1-eneOctadecyltrichlorosilane

    Precursor

    1-Chlorooctadecane
    octadec-1-ene
    Trichlorosilane
    1-octadecylmagnesium bromide

    Downstream Product

    Octadecyltrimethoxysilane

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