Skip to Content
Merck
All Photos(3)

Key Documents

View All Documentation

Safety Information

235687

Sigma-Aldrich

Hexamethylcyclotrisiloxane

98%

Synonym(s):

Cyclic (D3) permethylsiloxane

Sign Into View Organizational & Contract Pricing
All Photos(3)

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

Looking for similar products? Visit Product Comparison Guide

Related Categories

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

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

FSL

Group 2: Flammable solids
Flammable solid
Hazardous rank III

JAN Code

235687-25G:
235687-BULK:
235687-VAR:
235687-100G:

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
STBL4226
STBL0984
STBK6788
STBK2699
STBJ9653

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

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)
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service