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HomeProduct name listPentamethyldisiloxane

Pentamethyldisiloxane

  • CAS NO.:1438-82-0
  • Empirical Formula: C5H16OSi2
  • Molecular Weight: 148.35
  • MDL number: MFCD00053658
  • EINECS: 215-873-5
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-03-12 22:07:32
Pentamethyldisiloxane Structural

What is Pentamethyldisiloxane?

The Uses of Pentamethyldisiloxane

Pentamethyldisiloxane, is an organosilicon compound used in synthesis of siloxane-polyether copolymer surfactants. Pentamethyldisiloxane can also be used as source of the trimethylsilyl functional group in organic synthesis.

The Uses of Pentamethyldisiloxane

Pentamethyldisiloxane is used in the synthesis of siloxane-polyether copolymer surfactants. It is also used as source of trimethylsilyl functional group in organic synthesis.

Synthesis

Synthesis_1438-82-0
Take prepared potassium trimethylsilanolate 1.12kg in 2L of anhydrous tetrahydrofuran, was added dropwise with stirring dimethylchlorosilane1kg, dropwise, room temperature reaction 1h, filtered, concentrated, extracted with ether, dried and concentrated to give a high purity of 98% or more of pentamethyl disiloxane 1.2kg.

Properties of Pentamethyldisiloxane

Boiling point: 86 °C (lit.)
Density  0.760 g/mL at 20 °C (lit.)
refractive index  n20/D 1.373
Flash point: -9°C
form  clear liquid
Specific Gravity 0.758
color  Colorless to Almost colorless
Water Solubility  Not miscible or difficult to mix in water.
Sensitive  Moisture Sensitive
Hydrolytic Sensitivity 3: reacts with aqueous base
BRN  1734568
InChI InChI=1S/C5H16OSi2/c1-7(2)6-8(3,4)5/h7H,1-5H3
EPA Substance Registry System Disiloxane, pentamethyl- (1438-82-0)

Safety information for Pentamethyldisiloxane

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
GHS Hazard Statements H225:Flammable liquids
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

Computed Descriptors for Pentamethyldisiloxane

InChIKey AOJHDNSYXUZCCE-UHFFFAOYSA-N
SMILES [Si](C)(C)(C)O[SiH](C)C

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