Testing Information

Testing Status of Agents at NTP

CAS Registry Number: 75-77-4 (Chlorotrimethylsilane)

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http://ntp.niehs.nih.gov/go/23355

Selected information from two of the National Library of Medicine's databases: ChemIDPlus1 and HSDB2.

Structure

Chemical Structure for CAS Registry Number 75-77-4 from NLM

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Chemical Properties2

Property Description
Color/Form
  • Colorless liquid
Odor
  • SHARP, HYDROCHLORIC ACID-LIKE ODOR; ACRID.
Taste
  • None found
Boiling Point
  • 57 deg C
Melting Point
  • -40 deg C
Molecular Weight
  • 108.642
Corrosivity
  • None found
Critical Temperature & Pressure
  • None found
Density/Specific Gravity
  • 0.854 AT 25 DEG C/25 DEG C
Disassociation Constants
  • None found
Heat of Combustion
  • -10,300 BTU/LB (EST)
Heat of Vaporization
  • 126 BTU/LB
log P (octanol-water)
  • None found
pH
  • None found
Solubilities
  • Sol in benzene, ether, perchloroethylene
Spectral Properties
  • Index of refraction = 1.3870 at 25 deg C/D
  • IR: 5508 (Coblentz Society Spectral Collection)
  • 1H NMR: 3444 (Sadtler Research Laboratories Spectral Collection)
  • MASS: 61136 (NIST/EPA/MSDC Mass Spectral Database, 1990 version)
  • 13C NMR: 158 (Stothers, Carbon-13 NMR Spectroscopy, Academic Press, New York)
Surface Tension
  • LIQ SURFACE TENSION: 17.8 DYNES/CM(EST)
Vapor Density
  • 3.75 (Air=1)
Vapor Pressure
  • 234 mm Hg at 25 deg C
Relative Evaporation Rate
  • None found
Viscosity
  • None found
Other Properties
  • Ratio of specific heats of vapor (gas): 1.0683. (est)
  • Readily hydrolyzed with liberation of hydrochloric acid
  • Organo-functional silanes are noted for their ability to bond organic polymer systems to inorganic substrates /Silane cmpd/
  • The reaction of organosilanes with halogens and halogen cmpd usually proceeds in good yield through cleavage of the Si--H bond and formation of the silicon-halogen bond. Reaction with fluorine, however, does not proceed satisfactorily because of cleavage of not only the Si--H but also C--Si and C--H bonds. Direct halogenation with chlorination, bromine, and iodine proceeds smoothly, however. /Organosilanes/
  • Hydroxyl radical reaction rate constant = 4.49X10-13 cu cm/molec sec at 25 deg C (est)

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Uses2

  • Intermediate for silicone fluids, as a chain terminating agent, imparting water repellency.
  • Silylating agent **PEER REVIEWED**
  • Component of catalyst for propylene oxide production **PEER REVIEWED**

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Superlist Classes1

  • Threshold Planning Quantity (TPQ) = 1000 lb

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Notes (Sources: NTP,HSDB,RTECS,MESH)1

  • None found

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Other Registry Numbers1

  • 127290-36-2
  • 36642-33-8

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Synonyms (Sources: NTP, HSDB,RTECS,MESH)1

  • 4-04-00-04007 (Beilstein Handbook Reference)
  • BRN 1209232
  • Chlorotrimethylsilane
  • HSDB 1009
  • Monochlorotrimethylsilicon
  • Silane, chlorotrimethyl-
  • Silane, trimethylchloro-
  • Silicane, chlorotrimethyl-
  • Silylium, trimethyl-, chloride
  • TL 1163
  • Trimethyl chlorosilane
  • Trimethylsilyl chloride

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Links to Additional Information1

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Footnotes

1 Source: the National Library of Medicine's ChemIDPlus, 10/28/2007.

2 Source: the National Library of Medicine's Hazardous Substance Database, 10/28/2007.

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Web page last updated on May 14, 2008