CAS 10025-78-2: Silane, trichloro-

Trichlorosilane is used to prepare silicon for semiconductors. It is an active ingredient used in the preparation of polysilicons and silicone resins. It acts as coupling agents and silane adhesion promoter. It is a precursor to prepare organosilicon compounds through hydrosilylation reactions. Further, it is involved in the preparation of octadecyltrichlorosilane, perfluoroctyltrichlorosilane, and perfluordecyltrichlorosilane. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Tri-substituted Silane Reducing Agent Organosilanes are hydrocarbon-like and possess the ability to serve as both ionic and free-radical reducing agents. These reagents and their reaction by-products are safer and more easily handled and disposed than many other reducing agents. The metallic nature of silicon and its low electronegativity relative to hydrogen lead to polarization of the Si-H bond yielding a hydridic hydrogen and a milder reducing agent compared to aluminum-, boron-, and other metal-based hydrides. A summary of some key silane reductions are presented in Table 1 of the Silicon-Based Reducing Agents brochure. Trichlorosilane; Silicochloroform hydrotrichlorosilane; Silicon chloride hydride; Trichloromonosilane SURFACE TRANSPORT ONLY, UPS FORBIDDENAIR TRANSPORT FORBIDDENViscosity, 25 °C: 0.23 cStΔHform: -482 kJ/molΔHvap: 28.0 kJ/molDipole moment: 0.97 debyeSpecific wetting surface: 240 m2/gSurface tension: 14.3 mN/mSpecific heat: 1.05 J/g/°CCoefficient of thermal expansion: 1.9 x 10-3Vapor pressure, -70 °C: 2.5 mmVapor pressure, 14.5 °C: 400 mmCritical temperature: 234 °CCritical pressure: 37 atmFlammability limit: 6.9-70.0%Undergoes hydrosilylation reactionsEmployed in production of high purity silicon metalGenerates chlorosilylene chemistryCarries out thionation and selenation of amides and lactams with elemental sulfur or selenium, respectivelyWill form high-boiling polymeric by-products with aqueous work-upReduces aromatic carbonyl systems to give benzyltrichlorosilanes, which can be desilylated to toluenesReduces phosphine oxides to phosphinesExtensive review of silicon based reducing agents: Larson, G.; Fry, J. L. "Ionic and Organometallic-Catalyzed Organosilane Reductions", Wipf, P., Ed.; Wiley, 2007