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Tetramethylsilane

Properties, data and information sources.

 

Contents

Tetramethylsilane is an organosilicon compound whose molecule consists of a central Si atom linked to four equivalent methyl groups to form a tetrahedral structure.

 

Names and Identifiers

Name
Tetramethylsilane
Formula
C4H12Si
Si(CH3)4
Molar mass
88.225 (g/mol)
CAS registry number
75-76-3
EC number EINECS
200-899-1
InChI Key
CZDYPVPMEAXLPK-UHFFFAOYSA-N

Other names, synonyms
Tetramethylsilicane

Abbreviation
TMS; Me4Si

 

Chemical formulas

Molecular formula and structural formula of Tetramethylsilane:

 

Tetramethylsilane

 

C4H12Si oder Si(CH3)4

Mr = 88.225 g/mol
SMILES: C[Si](C)(C)C

 

Data and Properties

Tetramethylsilane exists in pure form as a colorless, slightly acidic, volatile liquid.

solubility:
+ Soluble in organic solvents.
- Insoluble in water (19.6 mg/L at 25 °C).
  partition coefficient logPOW = 3.24.
melting point
-99.06 °C
boiling point
26.6 °C
flash point
-30 °C
ignition temperature
340 °C
density
0.641 g cm-3 at 25 °C

0.6688 g cm-3 at 20 °C

0.636 g cm-3 am Siedepunkt
vapor pressure
79.5 kPa at 20 °C
refractive index
nD = 1.3587 at 20 °C
standard entropie
0.3589 kJ/(mol K) at 25 °C
heat capacity
0.19517 kJ/(mol K)
thermal conductivity
0.1149 W/mK
dipole moment
0 D
permittivity
1.921 at 20 °C
(dielectric constant)

 

Spectroscopic data:

Tetramethylsilane is used as a solvent in NMR spectroscopy and is reference standard in 1H, 13C and 29Si NMR spectroscopy.

SPLASH (mass spectra)
splash10-00di-9000000000-c242e467cf90a192a2e5
MoNA Mass Bank of North America (mass spectrum)
CZDYPVPMEAXLPK-UHFFFAOYSA-N
SpectraBase (NMR, IR, FTIR, Raman, UV-Vis, MS ... spectra)
HCk7EiYEWBS
NIST IR-Spektrum
Tetramethylsilane

Calculated NMR spectrum (Predict Spectra via NMRDB)
1H NMR Spektrum, 13C NMR Spektrum.

 

Percentage and isotopic composition:

Mass-related elemental composition and isotope proportions of the compound Tetramethylsilane - C4H12Si - calculated based on molecular mass.

Symbol
Element ENumber x
of atoms ExData of the element
and isotopes *Percentages
of isotopesPercentage of
Ex in formula massC
Carbon4 Ar = 12.011 u
ΣAr = 48.044 u
12C: 12 u [98,94 %]
13C: 13.00335 u [1,06 %]
14C: 14.00324 u [<< 1 %] 
12C: 53.87898 %
13C: 0.57724 %
14C: trace
54.4562 %H
Hydrogen12 Ar = 1.008 u
ΣAr = 12.096 u
3H: 3.01605 u [<< 1 %]
1H: 1.00783 u [99,99 %]
2H: 2.0141 u [0,01 %] 
3H: trace
1H: 13.70903 %
2H: 0.00137 %
13.7104 %Si
Silicon1ΣAr = 28.085 u
28Si: 27.97693 u [92,254 %]
29Si: 28.97649 u [4,673 %]
30Si: 29.97377 u [3,073 %] 
28Si: 29.36757 %
29Si: 1.48757 %
30Si: 0.97824 %
31.8334 %

*) The third column lists the atomic masses or isotope masses of the elements involved and - in square brackets - the natural isotope composition.

 

More calculated data

The molar mass is M = 88.225 grams per mole.

The amount of substance in one kilogram of the substance is n = 11.335 mol.

The amount of substance in one gram of the substance is n = 0.011 mol.

Monoisotopic mass: 88.0708269214 Da - related to 12C41H1228Si.

 

Hazard warnings according to GHS

(General information without guarantee of accuracy and completeness! The information does not replace the chemical safety data sheet or a risk assessment, but rather provides a general overview of the risk posed by the hazardous substance.

Signal word: Danger

GHS hazard statements (H phrases):


H224
Extremely flammable liquid and vapour

H302
Harmful if swallowed

H411
Toxic to aquatic life with long lasting effects

The chemical produces acrid smoke and fumes when heated to high temperatures. The flammable air-steam mixtures are explosive in a range of 1 to 37.9% by volume.

Labeling in the EU: See ECHA Substance Infocard 100.000.818.

 

External Sources

PubChem:ID 6396ChemSpider:ID 6156UNII of the FDA (USA):Unique Ingredient Identifier 41Y0RBG14QEPA CompTox Chemicals Dashboard:DTXSID9026423

 

Manufacturers and Sources of Supply

The table below lists producers and suppliers of Tetramethylsilane as a commercial chemical for laboratories, research, industry and production with the corresponding contact details.

 

Literature Sources

[0] - Specialist and research articles in scientific journals via PubMed: Tetramethylsilane.

[1] - Włodzimierz Makulski, Karol Jackowski:
1H, 13C and 29Si magnetic shielding in gaseous and liquid tetramethylsilane.
In: Journal of Magnetic Resonance, 313, 106716, (2020), DOI 10.1016/j.jmr.2020.106716.

 

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Last update: 2023-11-23

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