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Product Code:SP302

Product Name:Methylphenylcyclosiloxane

Product Introduction:

It is a high-end cyclic organosilicon monomer, mainly composed of a mixture of trimeric, tetrameric and pentameric methylphenyl siloxanes. At room temperature, it appears as a colorless, transparent oily liquid. Its chemical structure contains both methyl and phenyl functional groups, combining the superior properties of the two groups. It features excellent resistance to high and low temperatures, radiation and superior electrical insulation. Meanwhile, it has a high refractive index, low volatility, outstanding anti-aging and anti-oxidation performance, along with stable chemical properties. As a core raw material for synthesizing methylphenyl silicone oils, phenyl silicone rubbers and phenyl silicone resins, it greatly enhances the high-temperature resistance, UV resistance and radiation resistance of materials thanks to the introduction of phenyl groups, compared with conventional dimethyl cyclic siloxanes. It is widely used in high-end fields such as aerospace, nuclear power, military industry, optoelectronics and specialty chemicals, serving as an indispensable key intermediate in the high-performance organosilicon industrial chain.

Basic Information

  • Chinese name:甲基苯基混合环体
  • CAS number:
  • Molecular formula:

Structural formula

Physical properties

Product standard

  • T/FSI 130-2023

Technical indicators

Project Indicator
Appearance Colorless transparent oily fluid
Refractive index, 25 ℃ ≥1.5400

Characteristic advantages

  • High temperature resistance.
  • Low temperature resistant.
  • Radiation resistant.
  • Damping coefficient and refractive index of organosilicon polymer can be significantly improved.

Application field

  • Used to prepare silicone oil containing methyl diphenyl siloxane link、silicone rubber and silicone resin.
  • Aerospace, national defense, nuclear industry.
  • Marine salt spray resistant paint.
  • Health and medicine.
  • Cosmetics.

Safe handling

  • Wear eye protection and protective gloves as required while handling the product.
  • Use the product in a well ventilated area.
  • Please consult our MSDS.

Use storage

  • When stored in its original container below 40°C and unopened, the shelf life is 2 years.
  • Store in a cool and dry place out of direct sunlight.
  • Keep out of the reach of children.

Packaging Information

  • Available in 25KGS drum.