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

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Names

[ CAS No. ]:
1873-88-7

[ Name ]:
1,1,1,3,5,5,5-Heptamethyltrisiloxane

[Synonym ]:
(TMSO)2MeSi
EINECS 217-496-1
HSi(OSiMe3)2Me
Trisiloxane,1,1,1,3,5,5,5-heptamethyl
Bis(trimethylsiloxy)methylsilane
Methylpolysilicone
HSi(OTMS)2Me
Methylbis(trimethylsilyloxy)silane
Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-
MFCD00048000
(Me3SiO)2MeSiH
1,1,1,3,5,5,5-Heptamethyltrisiloxane
HSi(OSMe3)2Me

Chemical & Physical Properties

[ Density]:
0.819 g/mL at 25 °C(lit.)

[ Boiling Point ]:
163.8±23.0 °C at 760 mmHg

[ Melting Point ]:
<0ºC

[ Molecular Formula ]:
C7H22O2Si3

[ Molecular Weight ]:
222.505

[ Flash Point ]:
52.8±22.6 °C

[ Exact Mass ]:
222.092758

[ PSA ]:
18.46000

[ LogP ]:
5.32

[ Vapour Pressure ]:
2.7±0.3 mmHg at 25°C

[ Index of Refraction ]:
n20/D 1.382(lit.)

[ Stability ]:
Stable. Flammable. Incompatible with strong oxidizing agents.

MSDS

Click to get detail MSDS

Safety Information

[ Symbol ]:

GHS02, GHS07

[ Signal Word ]:
Danger

[ Hazard Statements ]:
H225-H315-H319-H335

[ Precautionary Statements ]:
P210-P305 + P351 + P338-P370 + P378-P403 + P235

[ Hazard Codes ]:
Xi:Irritant;

[ Risk Phrases ]:
R10;R36/37/38

[ Safety Phrases ]:
S26-S36

[ RIDADR ]:
UN 1993 3/PG 2

[ WGK Germany ]:
3

[ HS Code ]:
2934999090

Synthetic Route

Click to get detail synthetic route

Precursor & DownStream

Precursor

  • methyl dichlorosilane
  • Hexamethyldisiloxane
  • Chlorotrimethylsilane
  • Sodium trimethylsilanolate
  • pentamethylcyclopentasiloxane
  • Pentamethyl Disiloxane
  • N-hexane

DownStream

  • 3-[Ethoxy(diisopropyl)silyl]-1-propanamine
  • hexadecyl-methyl-bis(trimethylsilyloxy)silane
  • Ethoxy(trimethyl)silane
  • trimethylsilyl benzoate
  • (3-glycidoxypropyl)bis(trimethylsiloxy)methylsilane
  • Methylbis(trimethylsilyloxy)vinylsilane
  • Octane
  • 1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane
  • 2-Octene

Customs

[ HS Code ]: 2934999090

[ Summary ]:
2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Related Compounds

  • 1,1,1,3,5,5,5-heptamethyltrisiloxane
  • 3-octyl-1,1,1,3,5,5,5-heptamethyltrisiloxane
  • 3-hexyl-1,1,1,3,5,5,5-heptamethyltrisiloxane
  • 3-Ethyl-1,1,1,3,5,5,5-heptamethyltrisiloxane
  • 3-vinyl-1,1,1,3,5,5,5-heptamethyltrisiloxane
  • 3-octyl-1,1,1,3,5,5,5-heptamethyltrisiloxane