Hexamethylcyclotrisiloxane
Hexamethylcyclotrisiloxane
  • CAS No.:541-05-9
Other grades of this product :

Hexamethylcyclotrisiloxane Basic information
Product Name:Hexamethylcyclotrisiloxane
Synonyms:2,2,4,4,6,6-Hexamethyl-1,3,5,2,4,6-trioxatrisilinane;CH7260;Cyclotrisiloxane, hexamethyl-;cyclotrisiloxane,hexamethyl-;Dimethylsiloxane cyclic trimer;hexamethylcyclortrisiloxane;hexamethyl-cyclotrisiloxan;HEXAMETHYLCYCLOTRISILOXANE, tech-95
CAS:541-05-9
MF:C6H18O3Si3
MW:222.46
EINECS:208-765-4
Product Categories:Organometallic  Reagents;Organosilicon;Siloxanes;Organics;Si (Classes of Silicon Compounds);Si-O Compounds
Mol File:541-05-9.mol
Hexamethylcyclotrisiloxane Chemical Properties
Melting point 50-64 °C (lit.)
Boiling point 134 °C (lit.)
density 1.02
vapor density 1 (vs air)
vapor pressure 0.014-671Pa at 24.85-25℃
RTECS GZ4705000
Fp 95 °F
storage temp. Inert atmosphere,Room Temperature
solubility soluble in most organic solvents.
form solid
Specific Gravity1.02
color White to Almost white
Water Solubility may decompose
Sensitive Moisture Sensitive
Hydrolytic Sensitivity1: no significant reaction with aqueous systems
BRN 1766829
Stability:Stable, but moisture sensitive. Incompatible with strong oxidizing agents. Highly flammable.
LogP-0.38-4.4 at 20-25℃
CAS DataBase Reference541-05-9(CAS DataBase Reference)
NIST Chemistry ReferenceHexamethylcyclotrisiloxane(541-05-9)
EPA Substance Registry SystemHexamethylcyclotrisiloxane (541-05-9)
Safety Information
Hazard Codes F,Xi
Risk Statements 11-36/37/38
Safety Statements 26
RIDADR UN 1325 4.1/PG 2
WGK Germany 3
TSCA Yes
HazardClass 4.1
PackingGroup II
HS Code 29319090
MSDS Information
ProviderLanguage
HexamethylcyclotrisiloxaneEnglish
ACROSEnglish
SigmaAldrichEnglish
ALFAEnglish
Hexamethylcyclotrisiloxane Usage And Synthesis
Chemical PropertiesWhite crystalline solid
Physical propertiesmp 64–64.5 °C; bp 133–134 °C.
UsesHexamethylcyclotrisiloxane is used in the preparation of graft polymers and block polymers. It is also a useful biochemical for proteomics research and also acts as an intermediate in organic reactions.
UsesHexamethylcyclotrisiloxane, is the simplest member of a series of cyclic oligodimethylsiloxanes, primarily used as synthetic equivalents for the reactive interme- diate dimethylsilanone. It is one of the main raw materials for silicone products. It is widely used in aviation, military industry, medicine and petrochemicals etc.
  1. Hexamethylcyclotrisiloxane undergoes ring-opening anionic polymerization reactions, suggesting use in polymer synthesis. It is also suggested for the treatment of powders and fillers to render them hydrophobic.

  2. Hexamethylcyclotrisiloxane mainly used for products of methyl vinyl silicone rubber. It’s also the important raw materials for synthesizing other high polymers.

  3. It may be used as an effective trapping reagent for a variety of short-lived intermediates, including silanones and silyenes.

  4. Hexamethylcyclotrisiloxane has many unique characteristics.The reaction of It is more active, can be easily and quickly polymerized under lower temperature and simple catalysts.

  5. may be used to synthesize many kinds of organic silicone products, which have better stability, better insulation properties and better water resistance.

  6. may be used to synthesize silicon rubber, which may has better elasticity, better abrasive resistance, and better corrosive resistance.

  7. may be used to synthesize silicone oil, which may has lower freezing point and less surface tension, it is slightly affected by temperature.

  8. Hexamethylcyclotrisiloxane is flammable. Use and store with all precautions required for Flammable Materials. Care should be exercised in handling GP-685 to prevent contact with skin or eyes. Wear safety glasses with side shields and rubber gloves when handling.

UsesHexamethylcyclotrisiloxane can be used as reagent for the preparation of dimethylsilanols, trapping of insitu- generated silanones, silylenes, silyl azides, silanethiones, and derivatives. Hexamethylcyclotrisiloxane, (D3) is the simplest member of a series of cyclic oligodimethylsiloxanes, primarily used as synthetic equivalents for the reactive intermediate dimethylsilanone. This characteristic is responsible for its extensive application in polymer chemistry. Hexamethylcyclotrisiloxane has also been exploited as an efficient trapping reagent for a variety of shortlived intermediates, including silanones and silyenes. The ability of D3 to intercept these reactive species has been attributed to its rigid, planar structure,8 and the resultant release of strain from ring expansion.
Flammability and ExplosibilityHighlyflammable
Hexamethylcyclotrisiloxane Preparation Products And Raw materials
Raw materialsTETRADECAMETHYLHEXASILOXANE-->DECAMETHYLTETRASILOXANE-->Octamethylcyclotetrasiloxane-->Dichlorodimethylsilane-->Chlorotrimethylsilane
Preparation ProductsTetradecamethylcycloheptasiloxane-->1,3-Bis(chloromethyl)-1,1,3,3-tetramethyldisiloxane-->CHLOROMETHYL METHYL SULFIDE-->Hexamethyldisiloxane

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