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1,1,1,3,5,5,5-Heptamethyltrisiloxane

97%

Synonym(s):

2,2,4,6,6-Pentamethyl-3,5-dioxa-2,4,6-trisilaheptane, 2-Hydro-1,1,1,2,3,3,3-heptamethyltrisiloxane, Bis(trimethylsiloxy)methylsilane, Heptamethylhydrotrisiloxane, Methylbis(trimethylsiloxy)silane

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About This Item

Linear Formula:
[(CH3)3SiO]2SiHCH3
CAS Number:
1873-88-7
Molecular Weight:
222.50
UNSPSC Code:
12352103
NACRES:
NA.22
PubChem Substance ID:
24863086
EC Number:
217-496-1
Beilstein/REAXYS Number:
1748455
MDL number:
MFCD00048000
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Quality Segment

assay

97%

refractive index

n20/D 1.382 (lit.)

bp

142 °C (lit.)

density

0.819 g/mL at 25 °C (lit.)

SMILES string

C[SiH](O[Si](C)(C)C)O[Si](C)(C)C

InChI

1S/C7H22O2Si3/c1-10(8-11(2,3)4)9-12(5,6)7/h10H,1-7H3

InChI key

QNWOFLWXQGHSRH-UHFFFAOYSA-N

Application

1,1,1,3,5,5,5-Heptamethyltrisiloxane can be used for the aromatic C-H silylation of arenes in the presence of a platinum complex catalyst.
It can also be used as a reagent to synthesize:
  • 3-Octyl-1,1,1,3,5,5,5-heptamethyltrisiloxane, an agricultural adjuvant and sensory performance enhancer used in cosmetic formulations.
  • Isoindigo-based conjugated polymer with siloxane-terminated solubilizing group.
  • Monosiloxy esters with a variety of acids.

Pictograms

FlameExclamation mark
GHS02,GHS07

Signal Word

Danger

Hazard Classifications

Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class

3 - Flammable liquids

WGK

WGK 3

Flash Point (°F)

71.6 °F - closed cup

Flash Point (°C)

22 °C - closed cup

PPE (personal protective equipment)

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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