RissoChem LOGO


Chemical Name:Dimethyldichlorosilane
Product Category:Silicone MonomerProduct
Structural Formula:75-78-5
CAS No.:75-78-5
Molecular Formula:(CH3)2SiCl2
Molecular Weight:129.1

Dimethyldichlorosilane Description

M2 Dichlorodimethylsilane(CAS 75-78-5)is referred to as DMDCS. It is a tetrahedral organosilicon compound with the chemical formula Si(CH3)2Cl2.
At room temperature, dimethyl unit is a colorless transparent liquid, flammable, explosive, is the basic raw material for silicone products, used in the production of silicone intermediates, silicone oil, silicone rubber and silicone resin, but also used in the manufacture of heat-resistant, high-strength carbonized fiber.

Product StandardGB/T 23953-2009
Flash Point16℃ (closed cup)
Melting point76°C
Boiling point71℃
Autoignition Temperature380°C
Relative density (water=1)1.07
Relative vapor density (air=1)4.4
Vapor pressure14.5kPa (20℃)
PH valueHCI is generated when it meets water.
Upper explosion limit [%”/0]3.4
Lower explosion limit [%(V/V)]9.5
Water solubilityWater reaction
Appearancecolorless transparent liquid with strong irritating odor
Mass fraction of dimethyldichloro silane / %99.5
Mass fraction of methyltrichloro silane / %0.05
  • Dichlorodimethylsilane is used to manufacture dimethyl silicone ether oil, silicone rubber, silicone resin, etc.
  • M2 Silicone Monomer is used as an intermediate in the manufacture of silicone resin.
NatureThis product is highly toxic: irritating to the respiratory tract and skin.
  • YES
Transportation & Safety info
  • UN No.: UN 1162
  • Transport hazard class(es) :  3
  • Packing group: II
  • Our standard packing is net 25kg / 200 kg drums / 1000kg/IBC,or according to your requirements.
  • Provided for free
Inventory items
  • 15 tons.

Packaging Specifications

Packaging Specifications
Contact Jessica G

Jessica G.

Get in touch to Get

  • Quick and helpful reply within 8 hours;
  • Tailored solutions provided for your project;
  • One-stop purchasing service.
Please enable JavaScript in your browser to complete this form.

Dimethyldichlorosilane​: Guide

Dimethyldichlorosilane is the basic raw material of silicone, which is used for the production of silicone intermediates (D4, DMC), silicone oil, silicone rubber and silicone resin, and also used for the manufacture of heat-resistant and high-strength carbonized fibers.

Industry, commonly used dimethyl dichlorosilane as the main raw material, by hydrolysis polycondensation into a silicon-oxygen (-Si-O-) bond as the main chain of silicon atoms directly connected to the organic groups of dimethylsiloxane mixed cyclic body (DMC).DMC can be separated to get the octamethylcyclotetrasiloxane (D4) and other higher purity cyclic body and linear body. In addition, various reactive functional groups can also be introduced into the siloxane molecular chain links through chemical reactions. The above types of siloxanes are generally called silicone intermediates.
Scroll to Top