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Product Code: SIT8155.0

Cas No: 10025-78-2

20 kg
2 kg
25 g
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


  • Viscosity, 25 °C: 0.23 cSt
  • ΔHform: -482 kJ/mol
  • ΔHvap: 28.0 kJ/mol
  • Dipole moment: 0.97 debye
  • Specific wetting surface: 240 m2/g
  • Surface tension: 14.3 mN/m
  • Specific heat: 1.05 J/g/°C
  • Coefficient of thermal expansion: 1.9 x 10-3
  • Vapor pressure, -70 °C: 2.5 mm
  • Vapor pressure, 14.5 °C: 400 mm
  • Critical temperature: 234 °C
  • Critical pressure: 37 atm
  • Flammability limit: 6.9-70.0%
  • Undergoes hydrosilylation reactions
  • Employed in production of high purity silicon metal
  • Generates chlorosilylene chemistry
  • Carries out thionation and selenation of amides and lactams with elemental sulfur or selenium, respectively
  • Will form high-boiling polymeric by-products with aqueous work-up
  • Reduces aromatic carbonyl systems to give benzyltrichlorosilanes, which can be desilylated to toluenes
  • Reduces phosphine oxides to phosphines
  • Extensive review of silicon based reducing agents: Larson, G.; Fry, J. L. "Ionic and Organometallic-Catalyzed Organosilane Reductions", Wipf, P., Ed.; Wiley, 2007
  • EINECS Number: 233-042-5

    Specific Gravity: 1.3417

    Flashpoint: -13°C (8°F)

    HMIS Key: 3-4-2-X

    Hydrolytic Sensitivity: 8: reacts rapidly with moisture, water, protic solvents

    Formula: HCl3Si

    Purity: 99%


    Refractive Index: 1.4020

    Application: Generates chlorosilylene chemistry.1
    Carries out thionation and selenation of amides and lactams with elemental sulfur or selenium, respectively.2

    Reference: 1. Jung, I. N. et al. Organometallics 2003, 22, 2551.
    2. Shibahara, F. et al. Org. Lett. 2009, 11, 3064.

    Fieser: F&F: Vol. 3, p 298; Vol. 4, p 525; Vol. 5, p 688; Vol. 7, p 606; Vol. 11, p 553; Vol. 13, p 322; Vol. 14, p 82; Vol. 18, p 373.

    Additional Properties: 215
    Dipole moment: 0.97 debye
    Critical pressure: 37 atm
    Specific wetting surface: 240 m2/g
    37 atm
    Surface tension: 14.3 mN/m
    Specific heat: 0.25 cal/g/°
    Coefficient of thermal expansion: 1.9 x 10-3
    Reducing agent
    Vapor pressure, 14.5°: 400 mm
    Critical temperature: 234°C