VX

• Formula: C₁₁H₂₆NO₂PS
• Molecular weight: 267.368
• IUPAC Standard InChI: InChI=1S/C11H26NO2PS/c1-7-14-15(6,13)16-9-8-12(10(2)3)11(4)5/h10-11H,7-9H2,1-6H3 Copy

  
• IUPAC Standard InChIKey: JJIUCEJQJXNMHV-UHFFFAOYSA-N Copy
• CAS Registry Number: 50782-69-9
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Phosphonothioic acid, methyl-, S-[2-[bis(1-methylethyl)amino]ethyl] O-ethyl ester; O-Ethyl S-(2-diisopropylaminoethyl) methylphosphonothioate; O-Ethyl S-(2-diisopropylaminoethyl) methylthiophosphonate; Tx 60; O-Ethyl S-2-diisopropylaminoethyl methylphosphonothiolate; S-[2-(Diisopropylamino)ethyl] o-ethyl methylphosphonothioate; Methyl-phosphonothioic acid S-(2-diisopropylamino-ethyl) ester O-ethyl ester; Phosphonohioic acid, methyl, O-ethyl-S-(2-diisopropylaminoethyl) ester; Phosphonothioic acid, P-methyl-, S-(2-(bis(1-methylethyl)amino)ethyl) O-ethyl ester; VX agent; Methylthiophosphonic acid, O-ethyl-S-[2-(N,N-diisopropylamino)ethyl] ester
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Phase change data
  • Mass spectrum (electron ionization)
  • Gas Chromatography
  • References
  • Notes
• Options:
  • Switch to SI units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Phase change data

Go To: Top, Mass spectrum (electron ionization), Gas Chromatography, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Mass spectrum (electron ionization)

Go To: Top, Phase change data, Gas Chromatography, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

Additional Data

Gas Chromatography

Go To: Top, Phase change data, Mass spectrum (electron ionization), References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Van Den Dool and Kratz RI, non-polar column, temperature ramp

View large format table.

Van Den Dool and Kratz RI, polar column, temperature ramp

View large format table.

Normal alkane RI, non-polar column, temperature ramp

View large format table.

Normal alkane RI, non-polar column, custom temperature program

View large format table.

References

Go To: Top, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Rittfeldt, 2001
Rittfeldt, Lars, Determination of Vapor Pressure of Low-Volatility Compounds Using a Method To Obtain Saturated Vapor with Coated Capillary Columns, Anal. Chem., 2001, 73, 11, 2405-2411, https://doi.org/10.1021/ac010015v . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R., Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [all data]

Frostling, Åse, et al., 1974
Frostling, Harald; Åse, Kjell; Borgan, A.; Østvold, Terje; Bjørseth, Alf; Powell, D.L., The Vapour Pressure of O-Ethyl,S-2-(N,N-diisopropylamino)-ethylmethylphosphonothioate., Acta Chem. Scand., 1974, 28a, 83-85, https://doi.org/10.3891/acta.chem.scand.28a-0083 . [all data]

Kostiainen, 2000
Kostiainen, O., Gas Chromatography in Screening of Chemicals Related to the Chemical Weapons Convention in Encyclopedia of Analytical Chemistry, Meyers, R.A., ed(s)., John Wiley Sons Ltd, Chichester, 2000, 963-979. [all data]

D'agostino, Provost, et al., 1987
D'agostino, P.A.; Provost, L.R.; Visentini, J., Analysis of O-Ethyl S-[2-(Diisopropylamino)ethyl] Methylphosphonothiolate (VX) by Capillary Column Gas Chromatography-Mass Spectrometry, J. Chromatogr., 1987, 402, 221-232, https://doi.org/10.1016/0021-9673(87)80020-1 . [all data]

D'Agostino and Provost, 1985
D'Agostino, P.A.; Provost, L.R., Gas chromatographic retention indices of chemical warfare agents and simulants, J. Chromatogr., 1985, 331, 47-54, https://doi.org/10.1016/0021-9673(85)80005-4 . [all data]

Savel'eva, Zenkevich, et al., 2003
Savel'eva, E.I.; Zenkevich, I.G.; Radilov, A.S., Identification the Products of Chemical Neutralization of O-Isobutyl-S-(2-diethylaminoethyl)methylthiophosphonate in the Composition of Bitumen-Salt Matrices, Zh. Anal. Khim. (Rus.), 2003, 58, 2, 135-145. [all data]

Söderström, Ketola, et al., 1995
Söderström, M.T.; Ketola, R.A.; Kostiainen, O., Identification of some nerve agent homologues and dialkyl methylphosphonates by gas chromatography/Fourier transform infrared spectrometry. Part II. Spectral search with the help of retention indices, Fresenius J. Anal. Chem., 1995, 352, 6, 550-556, https://doi.org/10.1007/BF00323072 . [all data]

Staples, 2006
Staples, E.J., Creating a compound library for chemical warfare agents for the ZNose, 2006, retrieved from http://www.estcal.com/TechPapers/Security/CWA-Libraries.pdf. [all data]

Tsunoda, 2005
Tsunoda, N., The sarin incidents in Japan and mass spectrometry, J. MAss Spectrom. Soc. Japan, 2005, 53, 3, 157-163, https://doi.org/10.5702/massspec.53.157 . [all data]

OPCW, 1997
OPCW, Conference of the States Parties C-I/DEC.64 (22 May 1997), 1997, retrieved from http://www.opcw.org/html/global/c_series/csp1/CI_DEC64.html. [all data]

Notes

Go To: Top, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References

• Symbols used in this document:
  

  ΔvapH

  Enthalpy of vaporization

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.