Dongguan City Betterly New Materials Co., Ltd.

1,1,3,3,5,5-Hexamethylcyclotrisilazane

CAS: 1009-93-4

1,1,3,3,5,5-Hexamethylcyclotrisilazane is a crucial cyclosiloxane known for its excellent hydrolysis stability, attributed to the high steric hindrance of its phenyl groups. When used as a heat resistance agent in silicone rubber, 1,1,3,3,5,5-Hexamethylcyclotrisilazane effectively enhances thermal stability by preventing oxidative crosslinking and degradation of the rubber’s side chains. Additionally, prolonged heating at 400°C transforms 1,1,3,3,5,5-Hexamethylcyclotrisilazane into a polymer, creating a durable heat-resistant coating.


Get A Quote
Category: Silane
  • Physical Properties and Technology Index of 1,1,3,3,5,5-Hexamethylcyclotrisilazane

    1,1,3,3,5,5-Hexamethylcyclotrisilazane is a colorless, transparent liquid that is non-toxic. 1,1,3,3,5,5-Hexamethylcyclotrisilazane is soluble in organic solvents such as ethyl acetate, toluene, and cyclohexane.


    ItemProperty Index
    CAS No.4570-25-6
    Molecular weight591.924
    Density (25℃) g/cm31.19
    Flash point (close cup method)330.135℃
    SolublenessSoluble in toluene, heptane
    and other organic solvents
    AppearanceWhite crystal
    Hexaphenyl cyclotrisilazane content≥98.0%


  • Storage of 1,1,3,3,5,5-Hexamethylcyclotrisilazane

    Store 1,1,3,3,5,5-Hexamethylcyclotrisilazane in a cool, well-ventilated warehouse with a temperature below 37°C. Do not store it alongside oxidants, edible chemicals, or readjusting agents. Keep the container sealed and away from fire and heat sources.

  • Precautions of 1,1,3,3,5,5-Hexamethylcyclotrisilazane

    • Use 1,1,3,3,5,5-Hexamethylcyclotrisilazane in a well-ventilated area and wear appropriate safety protection to avoid excessive inhalation. Do not ingest.

    • Handle with care as per the MSDS. In addition, safety regulation of country or local government should be obeyed.


Get a Catalog & Best Price