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1118-02-1 Usage

Chemical Properties

Clear colorless liquid


Trimethylsilyl isocyanate is used in the preparation of 1-unsubstituted 4-(dialkylamino) imidazolin-2-ones. It finds application in the carbamoylation of aromatic hydrocarbons and alcohols. It is also used in the preparation of primary amides from Grignard reagents. Further, it is used in the synthesis of cyclic imides. It is also utilized for the synthesis of trifluoroacetyl isocyanate and cyclic imides. In addition to this, it is employed in the conversion of isocyanates to carbodiimides using cyclopentadienyl Mn(CO)3 catalysis.

Purification Methods

Purify it by repeated fractionation as for the isothiocyanate. [Eaborn J Chem Soc 3077 1950, Beilstein 4 III 1861, 4 IV 4011.]

Check Digit Verification of cas no

The CAS Registry Mumber 1118-02-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,1 and 8 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1118-02:
41 % 10 = 1
So 1118-02-1 is a valid CAS Registry Number.

1118-02-1 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • TCI America

  • (T1106)  Trimethylsilyl Isocyanate  >95.0%(GC)

  • 1118-02-1

  • 5g

  • 490.00CNY

  • Detail
  • TCI America

  • (T1106)  Trimethylsilyl Isocyanate  >95.0%(GC)

  • 1118-02-1

  • 25g

  • 1,390.00CNY

  • Detail
  • TCI America

  • (T1106)  Trimethylsilyl Isocyanate  >95.0%(GC)

  • 1118-02-1

  • 100g

  • 3,750.00CNY

  • Detail
  • Alfa Aesar

  • (A12633)  Trimethylsilyl isocyanate, 94%   

  • 1118-02-1

  • 10g

  • 848.0CNY

  • Detail
  • Alfa Aesar

  • (A12633)  Trimethylsilyl isocyanate, 94%   

  • 1118-02-1

  • 50g

  • 3522.0CNY

  • Detail
  • Alfa Aesar

  • (A12633)  Trimethylsilyl isocyanate, 94%   

  • 1118-02-1

  • 250g

  • 9088.0CNY

  • Detail
  • Aldrich

  • (252646)  (Trimethylsilyl)isocyanate  85%

  • 1118-02-1

  • 252646-5G

  • 1,048.32CNY

  • Detail
  • Aldrich

  • (252646)  (Trimethylsilyl)isocyanate  85%

  • 1118-02-1

  • 252646-25G

  • 4,956.12CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017


1.1 GHS Product identifier


1.2 Other means of identification

Product number -
Other names Isocyanatotrimethylsilane

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:1118-02-1 SDS

1118-02-1Related news

Interaction of TRIMETHYLSILYL ISOCYANATE (cas 1118-02-1) with xenon difluoride and fluoroxenonium triflate in the presence of alkenes09/24/2019

The title reactions lead to the corresponding β-fluoroisocyanates and β-isocyanatotriflates with the formation of the intermediates FXeNCO and OCNXeOSO2CF3.detailed

1118-02-1Relevant articles and documents



, p. 1222 (1948)


Photochemical synthesis of a stable terminal uranium(VI) nitride

Barluzzi, Luciano,Scopelliti, Rosario,Mazzanti, Marinella

, p. 19047 - 19051 (2020)

Terminal uranium nitrides have so far proven impossible to isolate by photolysis of azides. Here we report the second ever example of an isolated terminal uranium(VI) nitride. We show that the terminal nitride [NBu4][U(OSi(OtBu)3)4(N)], 3, can be prepared upon photolysis with UV light of the U(IV) azide analogue. This is achieved by careful tailoring of the azide precursor and of the reaction conditions. Complex 3 is stable under ambient conditions but reacts readily with electrophiles (H+ and CO).

Efficient synthesis of trimethylsilyl pseudohalides catalyzed by PEG400/ZnI2 under ultrasound irradiation

Sufang, Wang,Shaobing, Wang,Yongshen, Xu

, p. 1271 - 1276 (2005)

Trimethylsilyl pseudohalides Me3SiX, where X = NCS, NCO, or CN, were readily prepared conveniently in desirable yields by the reaction of Me3SiCl with NaX or KX catalyzed by PEG400 and zinc iodide under ultrasound irradiation. Copyright Taylor & Francis, Inc.

Eine einfache Methode zur Herstellung von Trimethylsilyl-cyanid, -isocyanat und isothiocyanat

Kantlehner, Willi,Haug, Erwin,Mergen, Walter W.

, p. 460 - 461 (1980)



Cradock, Stephen,Huntley, Christopher M.,Durig, J. R.

, p. 319 - 324 (1985)

We have redetermined the molecular structure of trimethylsilylisocyanate in the gas phase by electron diffraction.An ra structure is defined with bond distances (pm) SiN 174.0(4), SiC 186.4(2), N=C 120.2(16), C=O 117.6(10) and CH 109.9(5), bond angles (degrees) HCSi 109.0(9), CSiC 108.8(25), SiNC 156.9(30) and NCO 165.8(36), with the N=C bond eclipsing one Si-C bond and the Me3Si group tilted sligthly.The methyl groups are twisted 26.9(35) deg from the position giving the Me3Si group C3v symmetry in an (assumed) concerted fashion.The apparent deviations from linearity of the SiNCO skeleton are shown to be compatible with a pseudolinear structure similar to that of SiH3NCO.

New aspects of isocyanate synthesis with the use of O-silylurethanes

Kirilin, Aleksei D.,Belova, Liya O.,Pletneva, Maria V.,Golub, Nataliya A.,Storozhenko, Pavel A.,Kirilina, Nadezhda I.

, p. 99 - 100 (2017)

Silyl group at the nitrogen atom in the O-silylurethanes drastically affects the thermolysis processes and allows one to simplify the synthesis of methyl- and trimethylsilyl isocyanates.



, p. 290,294 (1961)


Stoichiometric Reactions of CO2 and Indium-Silylamides and Catalytic Synthesis of Ureas

Xu, Maotong,Jupp, Andrew R.,Stephan, Douglas W.

supporting information, p. 14277 - 14281 (2017/10/31)

The indium compounds In(N(SiMe3)2)2Cl?THF (2) and In(N(SiMe3)2)Cl2?(THF)n (3) were shown to react with CO2 to give [(Me3Si)2N)InX(μ-OSiMe3)]2 (X=N(SiMe3)2 4, Cl 5). 0.05–2.0 mol % of the species 3 acts as a pre-catalyst for the conversion of aryl and alkyl silylamines under CO2 (2–3 atm) to give the corresponding ureas in 70–99 % yields. A proposed mechanism is supported by experimental and computational data.

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