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235709

Sigma-Aldrich

Octamethyltrisiloxane

98%

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Synonym(s):
1,1,1,3,3,5,5,5-Octamethyltrisiloxane, Dimethylbis(trimethylsiloxy)silane, Pentamethyl(trimethylsiloxy)disiloxane, Pentamethyl(trimethylsilyloxy)disiloxane
Linear Formula:
[(CH3)3SiO]2Si(CH3)2
CAS Number:
Molecular Weight:
236.53
Beilstein:
1753063
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

vapor density

>1 (vs air)

Assay

98%

form

liquid

refractive index

n20/D 1.384 (lit.)

bp

153 °C (lit.)

mp

−82 °C (lit.)

density

0.82 g/mL at 25 °C (lit.)

SMILES string

C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C

InChI

1S/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3

InChI key

CXQXSVUQTKDNFP-UHFFFAOYSA-N

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This Item
8.44009469319370886
Octamethyltrisiloxane 98%

Sigma-Aldrich

235709

Octamethyltrisiloxane

refractive index

n20/D 1.384 (lit.)

refractive index

n20/D 1.384 (lit.)

refractive index

n20/D 1.384 (lit.)

refractive index

n20/D 1.382 (lit.)

bp

153 °C (lit.)

bp

153 °C (lit.)

bp

153 °C (lit.)

bp

142 °C (lit.)

mp

−82 °C (lit.)

mp

−82 °C (lit.)

mp

−82 °C (lit.)

mp

-

density

0.82 g/mL at 25 °C (lit.)

density

0.82 g/cm3 at 25 °C, 0.82 g/mL at 25 °C (lit.)

density

0.82 g/mL at 25 °C (lit.)

density

0.819 g/mL at 25 °C (lit.)

Quality Level

100

Quality Level

200

Quality Level

100

Quality Level

100

General description

Octamethyltrisiloxane, commonly referred to as octamethylcyclotetrasiloxane, falls under the category of siloxanes. Its versatile applications include serving as a solvent, coupling agent, and surface tension modifier in various industries. Furthermore, it plays a significant role in the production of adhesives, sealants, and lubricants.

Application

Octamethyltrisiloxane is used as a solvent for good dispersion of styrene and polydimethylsiloxane (PDMS), which are used in the fabrication of perovskite barium titanate inverse opal films.

Pictograms

Flame

Signal Word

Warning

Hazard Statements

Hazard Classifications

Flam. Liq. 3

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

84.2 °F - (External MSDS)

Flash Point(C)

29 °C - (External MSDS)

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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