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512990

Sigma-Aldrich

2,4,6,8-Tetramethylcyclotetrasiloxane

≥98.5%, ≥99.999% trace metals basis

Synonym(s):

1,3,5,7-Cyclotetra(methylsiloxane), 1,3,5,7-Tetramethylcyclotetrasiloxane, TMCTS

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About This Item

Linear Formula:
(HSiCH3O)4
CAS Number:
2370-88-9
Molecular Weight:
240.51
Beilstein:
1775282
EC Number:
219-137-4
MDL number:
MFCD00039567
UNSPSC Code:
12352103
PubChem Substance ID:
24873664
NACRES:
NA.23

Assay

≥98.5%
≥99.999% trace metals basis

form

liquid

refractive index

n20/D 1.387 (lit.)

bp

134 °C (lit.)

mp

−69 °C (lit.)

density

0.986 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

C[SiH]1O[SiH](C)O[SiH](C)O[SiH](C)O1

InChI

1S/C4H16O4Si4/c1-9-5-10(2)7-12(4)8-11(3)6-9/h9-12H,1-4H3

InChI key

BQYPERTZJDZBIR-UHFFFAOYSA-N

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General description

Atomic number of base material: 14 Silicon

Features and Benefits

Precursor for gate dielectrics in thin-film transistors (TFT), and is a component of photochemically formed SiOX monolayers on TiO.

Pictograms

Flame
GHS02

Signal Word

Warning

Hazard Statements

H226

Hazard Classifications

Flam. Liq. 3

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

75.2 °F - closed cup

Flash Point(C)

24 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Dae-Yoon Kim et al.
Soft matter, 11(1), 58-68 (2014-11-20)
Unconventional star-shaped liquid crystals (abbreviated as SiLCs) were successfully synthesized by chemically connecting four cyanobiphenyl anisotropic mesogens to the periphery of a super-hydrophobic and ultra-flexible cyclic tetramethyltetrasiloxane ring with flexible hexyl chains. Based on the combined experimental techniques of differential

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