Silane | Silanes | Chloro Silanes

SiSiB® PC5220

Synonym: Dichlorodimethylsilane

Countertype of DowCorning Z-1219, ShinEtsu KA-22

Chemical Structure


SiSiB® Chlorosilanes are a group of reactive, chlorine-containing silicon compounds, used in many chemical processes. Each such compound has at least one silicon-chlorine bond.

Typical Physical Properties

Chemical Name: Dimethyldichlorosilane
CAS No.: 75-78-5
EINECS No.: 200-901-0
Empirical Formula: C2H6Cl2Si
Molecular Weight: 129.06
Boiling Point: 70°C [760mmHg]
Flash Point: -7°C
Color and Appearance: Colorless clear liquid
Density [25°C]: 1.074
Refractive Index [25°C]: 1.402 [25°C]
Purity: 99.8% by GC


Methyl chlorosilanes have one to three methyl groups. In the case of dichlorodimethylsilane, two chlorine atoms are available, so that a reaction with excess water produces a linear chain of ether-like linkages between silicon atoms. As in polyethers, these flexible linkages produce a rubbery polymer, polydimethylsiloxane (PDMS). Trichloromethylsilane can be used to induce branching and cross-linking in PDMS molecules, while chlorotrimethylsilane serves to end backbone chains, limiting molecular weight.


Net weight 200Kg steel drum, for more details, please visit Packing Centre.

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