Skip to Content
Merck

Key Documents

View All Documentation

235695

Octamethylcyclotetrasiloxane

98%

Synonym(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

Sign In to View Organizational & Contract Pricing.

Select a Size

Change View

About This Item

Linear Formula:
[-Si(CH3)2O-]4
CAS Number:
556-67-2
Molecular Weight:
296.62
UNSPSC Code:
12352103
NACRES:
NA.23
PubChem Substance ID:
24853994
EC Number:
209-136-7
Beilstein/REAXYS Number:
1787074
MDL number:
MFCD00003269
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

vapor density

1 (vs air)

Quality Level

200

assay

98%

form

liquid

refractive index

n20/D 1.396 (lit.)

bp

175-176 °C (lit.)

mp

17-18 °C (lit.)

density

0.956 g/mL at 25 °C (lit.)

SMILES string

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

InChI key

HMMGMWAXVFQUOA-UHFFFAOYSA-N

General description

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.

Still not finding the right product?

Explore all of our products under Octamethylcyclotetrasiloxane

Storage Class

3 - Flammable liquids

flash_point_f

123.8 °F - closed cup

flash_point_c

51 °C - closed cup

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

Hazard Classifications

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

signalword

Danger

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
SDBB5491
SDBB2634
SDBB1773
STBL1043
STBL0288

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

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)
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)
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
View All Related Papers