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Dimethyl cyclosiloxane

Chemical Name: Dimethyl cyclosiloxane

Appearance: colorless transparent oily liquid

  • Product Overview
    • Performance and Technical Indexes
      Appearance and Properties:colorless transparent oily liquid

      PH Value:neutral                  Melting Point (℃):  without data

      Relative Density(Water’s=1):0.95-0.97

      Boiling Point(℃)≥135

      Relative Density (Air’s=1): without data

      Octanol/water  distribution coefficient :without data

      Pressure of Saturated Vapor(kPa):53.32/23.7℃

      Ignition Temperature (℃): without data         Flashing Point(℃):56,57.8

      Upper Limit of Explosion[%(V/V)]:without data

      Lower Limit of Explosion[%(V/V)]:without data

      Dissolubility:dissolvable in water,dissolvable in organic solvent such as benzene etc.


      Technical Indexes



      First grade

      Up to Standard

      Chroma/platinum-cobalt chroma No./Hazen


      Dioptre n20D


      Acidity count by Hcl/%


      Mass fraction of hexamethyl disiloxane/%



      Mass Fraction of cyclic/%


      Mass fraction of octomethyl tetrasiloxane/%

                                     Actual   measurement

      Application:High molar mass liner or crosslinking polysiloxane products can be produced under the effect of activator and through the reaction of balance ,addiction or condensation from one or several types of  linear ,cyclic or chained siloxane,including three types of polymer products such as silicone oil,silicone rubber,silicone etc.


      Hazard Characteristics :Being flammable ,it will produce carbon oxid and silicon dioxide when it burns and will decompose and produce formaldehyde when it heated to 200-300℃.Electrostatic force accumulates and may ignite inhalator .Hidden fire danger can be avoided by earth ,parallel connection or inertia gas protection.




      Polymerized Danger: Polymerization


      Condition to Avoid being Contacted :without data


      Banned Articles:oxidant may lead to a reaction


      Decomposition Products:silicon dioxide,carbon dioxide and minimum uncompleted combustion carbide ,formaldehyde


      Package ,storage and  transportation :It should be packed in 200L iron bucket (net weight 180kg/bucket)and be stored in a shady ,cool and ventilated storehouse .It should be kept away from kindling or heat sources .temperature in the storehouse above 30 ℃ is not suitable .Avoid direct sunlight .Air proof package is required. And it should be put and stored separately from oxidant , and alkali .corresponding varied and quantitative fire fighting equipment should be equipped .Mechanical equipment and tools which are easy to produce sparks are prohibited to be used . When conveying .take care of loading and unloading to avoid damage on package and vessels.

      Quality guarantee period of this product is 6 months .Recheck by this standard is required when the product exceeds the time limit .The product can still be used only after the result of recheck is up to the standard.