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235687

Sigma-Aldrich

Hexamethylcyclotrisiloxane

98%

Synonym(s):

Cyclic (D3) permethylsiloxane

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About This Item

Empirical Formula (Hill Notation):
C6H18O3Si3
CAS Number:
541-05-9
Molecular Weight:
222.46
EC Number:
208-765-4
MDL number:
MFCD00005943
UNSPSC Code:
12352103
PubChem Substance ID:
24853993
NACRES:
NA.22

vapor density

1 (vs air)

Assay

98%

form

solid

bp

134 °C (lit.)

mp

50-64 °C (lit.)

SMILES string

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

InChI

1S/C6H18O3Si3/c1-10(2)7-11(3,4)9-12(5,6)8-10/h1-6H3

InChI key

HTDJPCNNEPUOOQ-UHFFFAOYSA-N

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Application

Hexamethylcyclotrisiloxane (D3) can be used in the synthesis of:
  • Polysiloxanes by anionic ring-opening polymerization.        
  • Thin films by pulsed- plasma-enhanced chemical vapor deposition (PECVD) for the application of insulating biomaterials.
  •  Dimethoxydimethylsilane by treating with dimethyl carbonate via deoligomerization using alkali metal hydroxide catalyst.

Pictograms

Flame
GHS02

Signal Word

Danger

Hazard Statements

H228

Precautionary Statements

P210

Hazard Classifications

Flam. Sol. 1

Storage Class Code

4.1B - Flammable solid hazardous materials

WGK

WGK 3

Flash Point(F)

95.0 °F - closed cup

Flash Point(C)

35 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Synthesis of branched polysiloxanes with controlled branching and functionalization by anionic ring-opening polymerization.
Chojnowski J, et al.
Macromolecules, 36(11), 3890-3897 (2003)
Elisabetta Finocchio et al.
Chemosphere, 72(11), 1659-1663 (2008-07-08)
The decomposition of hexamethylcyclotrisiloxane (HMCTS) has been studied at room temperature and in the range 473-673 K over the surface of basic (CaO, MgO) and acidic oxides (Al(2)O(3), SiO(2)). Alumina allows the complete removal of HMCTS from synthetic biogases at
Robust block copolymer mask for nanopatterning polymer films.
Chao C C, et al.
ACS Nano, 4(4), 2088-2094 (2010)
Deoligomerization of siloxanes with dimethyl carbonate over solid-base catalysts
Okamoto M, et al.
Chemical Communications (Cambridge, England), (18), 1838-1839 (2001)
Living anionic polymerization of hexamethylcyclotrisiloxane (D3) using functionalized initiation.
Elkins C L and Long T E
Macromolecules, 37(17), 6657-6659 (2004)
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