Siloxanes | Cyclosiloxanes | Organosiloxanes | Cyclic Siloxanes

SiSiB® PC9240

Synonym: Hexamethylcyclotrisiloxane

Chemical Structure


SiSiB® PC9240 Hexamethylcyclotrisiloxane is the simplest member of a series of cyclic oligodimethylsiloxanes. SiSiB® PC9240 is one of the main raw materials for silicone products. It is widely used in aviation, military industry, medicine and petrochemicals etc.

Typical Physical Properties

Chemical Name: Hexamethylcyclotrisiloxane
CAS No.: 541-05-9
EINECS No.: 208-765-4
Empirical Formula: C6H18O3Si3
Molecular Weight: 222.46
Boiling Point: 134°C [760mmHg]
Flash Point: 35°C
Color and Appearance: White crystalline solid
Density [25°C]: 1.02
Refractive Index [25°C]: N/A
Purity: 98% by GC


SiSiB® PC9240 may be used as synthetic equivalents for the reactive intermediate dimethylsilanone.

SiSiB® PC9240 may be used as an effective trapping reagent for a variety of short-lived intermediates, including silanones and silyenes.

SiSiB® PC9240 (D3) has many unique characteristics than SiSiB® PC9100 (D4).
a. The reaction of SiSiB® PC9240 is more active, can be easily and quickly polymerized under lower temperature and simple catalysts.

b. SiSiB® PC9240 may be used to synthesize many kinds of organic silicone products, which have better stability, better insulation properties and better water resistance.

c. SiSiB® PC9240 may be used to synthesize silicon rubber, which may has better elasticity, better abrasive resistance, and better corrosive resistance.

d. SiSiB® PC9240 may be used to synthesize silicone oil, which may has lower freezing point and less surface tension, it is slightly affected by temperature.


Net weight 25Kg, or steel drum, net weight 170 kg., for more details, please visit Packing Centre.

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