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235695

Sigma-Aldrich

Octamethylcyclotetrasiloxane

98%

Synonyme(s) :

2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane, octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane

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About This Item

Formule linéaire :
[-Si(CH3)2O-]4
Numéro CAS:
556-67-2
Poids moléculaire :
296.62
Numéro Beilstein :
1787074
Numéro CE :
209-136-7
Numéro MDL:
MFCD00003269
Code UNSPSC :
12352103
ID de substance PubChem :
24853994
Nomenclature NACRES :
NA.23

Densité de vapeur

1 (vs air)

Pureté

98%

Forme

liquid

Indice de réfraction

n20/D 1.396 (lit.)

Point d'ébullition

175-176 °C (lit.)

Pf

17-18 °C (lit.)

Densité

0.956 g/mL at 25 °C (lit.)

Chaîne SMILES 

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

InChI

1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3

Clé InChI

HMMGMWAXVFQUOA-UHFFFAOYSA-N

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Description générale

Octamethylcyclotetrasiloxane (D4) is a volatile methylsiloxane (VMS) with a relatively low molecular weight. This silicone fluid has a silicon-oxygen bond in a cyclic arrangement and methyl groups are attached to the silicon atom. D4 can be used in the manufacture of silicone based polymers for use in medical devices and personal care products.

Application

D4 can be polymerized through ring opening mechanism with a rare earth solid super acid as a catalyst for potential usage in the synthesis of vinyl coated polydimethylsiloxane (PDMS). It may also be used as a probe liquid for nuclear magnetic resonance cryoporometry (NMRC) to analyze the pore size distribution (PSD) of oil-bearing tight sandstone. Chemical vapor deposition (CVD) of D4 may be utilized for the preparation of siloxane based thin films.

Pictogrammes

FlameHealth hazardEnvironment
GHS02,GHS08,GHS09

Mention d'avertissement

Warning

Mentions de danger

H226,H361f,H410

Classification des risques

Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Liq. 3 - Repr. 2

Code de la classe de stockage

3 - Flammable liquids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

123.8 °F - closed cup

Point d'éclair (°C)

51 °C - closed cup

Équipement de protection individuelle

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

Applying octamethylcyclotetrasiloxane as a probe liquid for characterizing the pore size distribution of oil-bearing tight sandstones by nuclear magnetic resonance cryoporometry.
Liu Biao, et al.
Marine and Petroleum Geology, 88(2), 814-825 (2017)
Hot-filament chemical vapor deposition of organosilicon thin films from hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane.
Lewis HGP
Journal of the Electrochemical Society, 148(12), F212-F220 (2001)
Stephanie Watermann et al.
Metabolites, 11(1) (2021-01-13)
1H NMR spectroscopy, in combination with chemometric methods, was used to analyze the methanol/acetonitrile (1:1) extract of walnut (Juglans Regia L.) regarding the geographical origin of 128 authentic samples from different countries (France, Germany, China) and harvest years (2016-2019). Due
Photocatalytic oxidation of octamethylcyclotetrasiloxane (D4): Towards a better understanding of the impact of volatile methyl siloxanes on photocatalytic systems.
Lamaa L, et al.
Applied Catalysis. B, Environmental, 156, 438-446 (2014)
Ramesh Sarangapani et al.
Toxicological sciences : an official journal of the Society of Toxicology, 67(2), 159-172 (2002-05-16)
Inhalation of octamethylcyclotetrasiloxane (D4) induces CYP2B1/2 protein and causes liver enlargement. We have developed a pharmacodynamic (PD) extension to a physiologically based pharmacokinetic (PBPK) model to characterize these dose-response behaviors. The PD model simulates interactions of D4 with a putative
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