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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)

Quality Level

100

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

signalword

Danger

hcodes

H228

pcodes

P210

Hazard Classifications

Flam. Sol. 1

Storage Class

4.1B - Flammable solid hazardous materials

wgk_germany

WGK 3

flash_point_f

95.0 °F - closed cup

flash_point_c

35 °C - closed cup

ppe

dust mask type N95 (US), Eyeshields, Gloves, type P3 (EN 143) respirator cartridges

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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Living anionic polymerization of hexamethylcyclotrisiloxane (D3) using functionalized initiation.
Elkins C L and Long T E
Macromolecules, 37(17), 6657-6659 (2004)
Anionic polymerization of hexamethylcyclotrisiloxane with acetylacetone initiator to form telechelic polymer
Kumar A and Eichinger BE
Macromolecules, 23(26), 5358-5358 (1990)
A S Chawla
Biomaterials, 2(2), 83-88 (1981-04-01)
Silicone coated Celgard-2400 and Silastic membranes were prepared by plasma polymerization of hexamethylcyclotrisiloxane. The adhesion of canine platelets and leucocytes was tested by passing whole blood from the anaesthetized mongrel dog in an ex-vivo shunt system. The silicone control Celgard
Intrinsically proton-conducting benzimidazole units tethered to polysiloxanes.
Persson J C and Jannasch P
Macromolecules, 38(8), 3283-3289 (2005)
Synthesis of branched polysiloxanes with controlled branching and functionalization by anionic ring-opening polymerization.
Chojnowski J, et al.
Macromolecules, 36(11), 3890-3897 (2003)
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