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Hexamethyldisilane

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Hexamethyldisilane Basic information
Hexamethyldisilane Chemical Properties
  • Melting point:9-12 °C(lit.)
  • Boiling point:112-114 °C(lit.)
  • Density 0.715 g/mL at 25 °C(lit.)
  • refractive index n20/D 1.422(lit.)
  • Flash point:29 °F
  • storage temp. Flammables area
  • form liquid
  • color colorless
  • Specific Gravity0.729
  • Water Solubility Insoluble in water. Soluble in alcohol, ether and acetone.
  • Hydrolytic Sensitivity1: no significant reaction with aqueous systems
  • BRN 1633463
  • InChIKeyNEXSMEBSBIABKL-UHFFFAOYSA-N
  • CAS DataBase Reference1450-14-2(CAS DataBase Reference)
  • NIST Chemistry ReferenceDisilane, hexamethyl-(1450-14-2)
  • EPA Substance Registry SystemDisilane, hexamethyl- (1450-14-2)
Safety Information
  • Hazard Codes F,Xi
  • Risk Statements 11-36/37-43-36/37/38
  • Safety Statements 16-23-45-9-33-26-7/9
  • RIDADR UN 1993 3/PG 2
  • WGK Germany 2
  • RTECS JM9170000
  • TSCA Yes
  • HazardClass 3
  • PackingGroup II
  • HS Code 29310095
  • ToxicityLD50 orally in Rabbit: 2160 mg/kg LD50 dermal Rabbit 2160 mg/kg
MSDS
Hexamethyldisilane Usage And Synthesis
  • Chemical PropertiesColorless clear liquid
  • Purification MethodsThe most likely impurity is trimethylchlorosilane (cf boiling point). Wash it with H2O, cold conc H2SO4, H2O again, then aqueous NaHCO3, dry over CaSO4 and fractionate at atmospheric pressure. [Brown & Fowles J Chem Soc 2811 1958.] A grossly impure sample (25% impurities) was purified by repeated spinning band distillation. This lowered the impurity level to 500ppm. The main impurity was identified as 1-hydroxypentamethyldisilane. [Beilstein 4 IV 4277.]
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