Dimethyldichlorosilane
Product introduction
YAC-DMDCS are formed by reaction of metallic silicon or ferrosilicon with hydrogen chloride or chlorine. YAC-DMDCS is a colorless clear liquid.
| CAS No. | 75-78-5 |
| EINECS No. | 200-901-0 |
| Formula | C2H6Cl2Si |
| Molecular Weight | 129.06 |
| Boiling Point | 70°C [760mmHg] |
| Flash Point | -7°C |
| Color and Appearance | Colorless clear liquid |
| Density 25/25°C | 1.07 |
| Refractive Index | 1.4022 [25°C] |
| Min. Purity | 99.80% |
Application
Methyl chlorosilanes have one to three methyl groups. In the case of YAC-DMDCS dimethyldichlorosilane, 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). Trimethylchlorosilane can be used to induce branching and cross-linking in PDMS molecules, while chlorotrimethylsilane serves to end backbone chains, limiting molecular weight.
Packing and Storage
YAC-DTCS2 organofunctional silanes are supplied in 200Kg steel drum.
In the unopened original container YAC-DTCS2 dimethyldichlorosilane has a shelf life of one year in a dry and cool place.