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235687

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
NACRES:
NA.22
PubChem Substance ID:
24853993
UNSPSC Code:
12352103
EC Number:
208-765-4
MDL number:
MFCD00005943
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vapor density

1 (vs air)

Quality Segment

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

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.

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Pictograms

Flame
GHS02

Signal Word

Danger

Hazard Codes

H228

Precautionary Statements

P210

Hazard Classifications

Flam. Sol. 1

Storage Class

4.1B - Flammable solid hazardous materials

WGK

WGK 3

Flash Point (°F)

95.0 °F - closed cup

Flash Point (°C)

35 °C - closed cup

PPE (personal protective equipment)

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

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