• Methylphenylcyclosiloxane CAS No.546-45-2

Methylphenylcyclosiloxane CAS No.546-45-2

Methylphenylcyclosiloxane is  1,3,5-trimethyl- 1,3,5-triphenylcyclotrisiloxane . It is a colorless transparent liquid which may contains some crystals. It is insoluble in water with a density higher than water.

Description of  Methylphenylcyclosiloxane

Name: Methylphenylcyclosiloxane

CAS NO.: 546-45-2

Molecular formula:<C21H24O3Si3

Molecular weight: 408.67

EINECS NO.: 205-746-2

Chemical structure: 


Technical parameters of Methylphenylcyclosiloxane

Appearance: Colorless transparent liquid
Purity(%): ≥99.5%  
Refractive index(n25D): approximately 1.55~1.57

Boiling point:

402.3 °C ºC [760 mmHg] for A3


Flash point:

163.2ºC for A3


Applications of Methylphenylcyclosiloxane:

Used as an important raw material in the synthesis of phenyl-contained silicone oil, silicone resin and silicone rubber. With the introduction of phenyl groups in these silicone polymers, their heat resistance, low temperature resistance, radiation resistant, damping property and refractive Index could be increased.


Meanwhile, the introduction of phenyl groups in these polymers, their compatibility with other components could be also improved.

Storage & transportation

Keep in cool, shading and dry place, to protect from water, moisture, acid and strong oxidant.

To protect from rain and direct sunlight during transportation.

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  • Formula: ≥99%
  • Place of Origin china
  • Purity: ≥99.7%
  • CAS NO.: 546-45-2
  • EINECS NO.: C21H24O3Si3,C28H32O4Si4 and C35H40O5Si5

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