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HomeProduct name list1,1,1,3,5,5,5-Heptamethyltrisiloxane

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

Synonym(s):1,1,1,3,5,5,5-Heptamethyltrisiloxane

  • CAS NO.:1873-88-7
  • Empirical Formula: C7H22O2Si3
  • Molecular Weight: 222.5
  • MDL number: MFCD00048000
  • EINECS: 217-496-1
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-10-28 16:48:35
1,1,1,3,5,5,5-Heptamethyltrisiloxane Structural

What is 1,1,1,3,5,5,5-Heptamethyltrisiloxane?

Description

Bis (trimethylsiloxy) methylsilane acts as an important raw material and intermediate used in organic synthesis, pharmaceutical and dyestuff. For example, it can be used for the platinum-catalyzed aromatic C-H silylation of arenes. It can also be used for the silylation of aryl iodides.

Chemical properties

colourless liquid

The Uses of 1,1,1,3,5,5,5-Heptamethyltrisiloxane

1,1,1,3,5,5,5-Heptamethyltrisiloxane is a Basic material for synthetic polyalkyleneoxide modified heptamethyltrisiloxane which is a kind of specific structure surfactant for pesticide additives, coating additives, etc.

The Uses of 1,1,1,3,5,5,5-Heptamethyltrisiloxane

Bis(trimethylsiloxy)methylsilane is an important raw material and intermediate used in organic synthesis, pharmaceutical and dyestuff.

The Uses of 1,1,1,3,5,5,5-Heptamethyltrisiloxane

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.

Flammability and Explosibility

Flammable

References

https://www.alfa.com/zh-cn/catalog/H60586/
Murata, Miki, et al. "Silylation of Aryl Iodides with 1,1,1,3,5,5,5 -Heptamethyltrisiloxane Catalyzed by Transition-Metal Complexes." Synlett 2007.09(2007):1387-1390.
Murata, Miki, et al. "Platinum-Catalyzed Aromatic C—H Silylation of Arenes with 1,1,1,3,5,5,5-Heptamethyltrisiloxane." Cheminform38.50 (2007):no-no.

Properties of 1,1,1,3,5,5,5-Heptamethyltrisiloxane

Melting point: <0°C
Boiling point: 142 °C (lit.)
Density  0.819 g/mL at 25 °C (lit.)
vapor pressure  8.5hPa at 25℃
refractive index  n20/D 1.382(lit.)
Flash point: 82 °F
storage temp.  15-25°C
solubility  Chloroform (Soluble), Methanol (Slightly)
form  clear liquid
Specific Gravity 0.8136
color  Colorless to Almost colorless
Water Solubility  Miscible with acetone, ethanol, diethyl ether. Insoluble in water.
Hydrolytic Sensitivity 3: reacts with aqueous base
BRN  1748455
Stability: Stable. Flammable. Incompatible with strong oxidizing agents.
CAS DataBase Reference 1873-88-7(CAS DataBase Reference)
NIST Chemistry Reference Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-,(1873-88-7)
EPA Substance Registry System Trisiloxane, 1,1,1,3,5,5,5-heptamethyl- (1873-88-7)

Safety information for 1,1,1,3,5,5,5-Heptamethyltrisiloxane

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H225:Flammable liquids
H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P302+P352:IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for 1,1,1,3,5,5,5-Heptamethyltrisiloxane

InChIKey QNWOFLWXQGHSRH-UHFFFAOYSA-N

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