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Chemical Properties

CAS Registry Number: 78-40-0

Selected information from two of the National Library of Medicine's databases: ChemIDPlus2 and HSDB3.

Names 1

  • Phosphoric Acid, Triethyl Ester (9ci)
  • Triethyl phosphate

Structure

Chemical Structure for Chemical Abstracts Service Registry Number 78-40-0 from NLM

Synonyms (Sources: NTP,HSDB,RTECS,MESH)2

  • 4-01-00-01339 (Beilstein Handbook Reference)
  • BRN 1705772
  • HSDB 2561
  • Phosphoric acid, triethyl ester
  • TEP
  • Triethoxyphosphine oxide
  • Triethyl phosphate
  • Triethylfosfat [Czech]

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Other Registry Numbers2

  • None Found

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Chemical Properties3

Property Description
Boiling Point
  • 215.5 deg C
Color/Form
  • Colorless, high-boiling liquid
  • Liquid
Corrosivity
  • None Found
Critical Temperature & Pressure
  • None Found
Density/Specific Gravity
  • 1.0695 g/cu cm at 20 deg C
Dissociation Constants
  • None Found
Heat Of Combustion
  • None Found
Heat Of Vaporization
  • None Found
Melting Point
  • -56.4 deg C
Molecular Weight
  • 182.154
Odor
  • Mild
  • Pleasant smelling
Other Chemical/Physical Properties
  • Bulk density = 8.90 lb/gal at 20 deg C. Combustible.
  • Dielectric constant = 13.20
  • Henry's Law constant = 3.60X10-8 atm-cu m/mol at 20 deg C
  • Hydroxyl radical reaction rate constant = 5.53X10-11 cu cm/molec-sec at 25 deg C
  • Liquid molar volume = 0.1708 cu-m/kmol; Enthalpy Heat of Formation = -1.245X10+9 J/kmol
Relative Evaporation Rate
  • None Found
Solubilities
  • In water, 5.00X10+5 mg/L at 25 deg C
  • Soluble in diethyl ether, benzene; very soluble in ethanol; slightly soluble in chloroform
  • Soluble in most organic solvents, alcohol, ether.
Spectral Properties
  • 1H NMR: 482 (Varian Associates NMR Spectra Catalogue)
  • IR: 5770 (Coblentz Society Spectral Collection)
  • Index of refraction = 1.4053 at 20 deg C
  • MASS: 7689 (NIST/EPA/MSDC Mass Spectral Database 1990 version)
  • SADTLER REF NUMBER: 377 (IR, PRISM); 482 (NMR, VARIAN)
Surface Tension
  • 3.82X10-2 N/m at 216 K
Taste
  • None Found
Vapor Density
  • 6.28 (Air= 1)
Vapor Pressure
  • 0.39 mm Hg at 25 deg C
Viscosity
  • 1.46 cSt at 25 deg C
log P (octanol-water)
  • log Kow = 0.80
pH
  • None Found

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Uses3

  • As a plasticizer, solvent, fire-retarding agent, anti-foaming agent **PEER REVIEWED**
  • As an ethylating agent, and as a raw material to prepare insecticides such as tetraethyl pyrophosphate. **PEER REVIEWED**
  • As ethylating agent; formation of polyesters which are used as insecticides. **PEER REVIEWED**
  • Solvent; plasticizer for resins, plastics, gums; catalyst; lacquer remover. **PEER REVIEWED**
  • Used as a catalyst in the production of acetic anhydride by the ketene process, as a desensitizing agent for peroxides, and as a solvent and plasticizer for cellulose acetate. **PEER REVIEWED**

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Notes (Sources: NTP,HSDB,RTECS,MESH)2

  • None Found.

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Superlist Classes2

  • None Found

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Links to Additional Information2

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Footnotes

1 Source: the NTP's CEBS database.

2 Source: the National Library of Medicine's ChemIDPlus, 02/28/2017.

3 Source: the National Library of Medicine's Hazardous Substance Database, 02/28/2017.

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