Phosphoric acid, trimethyl ester
- Formula: C3H9O4P
- Molecular weight: 140.0749
- IUPAC Standard InChI: InChI=1S/C3H9O4P/c1-5-8(4,6-2)7-3/h1-3H3
- IUPAC Standard InChIKey: WVLBCYQITXONBZ-UHFFFAOYSA-N
- CAS Registry Number: 512-56-1
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
View 3d structure (requires JavaScript / HTML 5) - Other names: Methyl phosphate; Trimethoxyphosphine oxide; Trimethyl orthophosphate; Trimethyl phosphate; (CH3O)3PO; Methyl phosphate, (MeO)3PO; NCI-C03781; TMP; Trimethylfosfat; O,O,O-Trimethyl phosphate; NSC 58985; TMPA; TMPO
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Phase change data
Go To: Top, 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 as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔvapH° | 11.4 | kcal/mol | CGC | Panneerselvam, Antony, et al., 2007 | Based on data from 408. to 438. K.; AC |
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 11.7 | 311. | A | Stephenson and Malanowski, 1987 | Based on data from 296. to 466. K. See also Stull, 1947.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 299. to 465.9 | 4.96246 | 2249.287 | -12.294 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Gas Chromatography
Go To: Top, Phase change data, 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
Normal alkane RI, non-polar column, temperature ramp
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | HP-1 | 902. | Peters, de Leer, et al., 1994 | 25. m/0.2 mm/0.33 μm, He, 50. C @ 5. min, 8. K/min, 300. C @ 10. min |
| Capillary | OV-101 | 894. | Spiteller and Spiteller, 1979 | He, 75. C @ 7. min, 2. K/min; Column length: 25. m; Tend: 280. C |
Normal alkane RI, non-polar column, custom temperature program
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | DB-5 MS | 921. | Tsunoda, 2005 | 30. m/0.25 mm/0.25 μm, Helium; Program: 45 0C (2 min) 8 0C/min -> 125 0C 15 0C/min -> 280 0C |
| Capillary | DB-5 | 928. | Soderstrom, White, et al., 2001 | Program: not specified |
| Capillary | DB-5 | 930. | Soderstrom, White, et al., 2001 | Program: not specified |
| Capillary | DB-5 | 932. | Soderstrom, White, et al., 2001 | Program: not specified |
| Capillary | DB-5 | 936. | Soderstrom, White, et al., 2001 | Program: not specified |
| Capillary | DB-5 | 938. | Soderstrom, White, et al., 2001 | Program: not specified |
| Capillary | Methyl Silicone | 906. | Zenkevich, 1999 | Program: not specified |
References
Go To: Top, Phase change data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Panneerselvam, Antony, et al., 2007
Panneerselvam, K.; Antony, M.P.; Srinivasan, T.G.; Rao, P.R. Vasudeva,
Measurement of enthalpies of vaporization of trialkyl phosphates using correlation gas chromatography,
Thermochimica Acta, 2007, 466, 1-2, 49-56, https://doi.org/10.1016/j.tca.2007.10.007
. [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]
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Peters, de Leer, et al., 1994
Peters, R.J.D.; de Leer, E.W.B.; Versteegh, J.F.M.,
Identification of Halogenated Compounds Produced by Chlorination of Humic Acid in the Presence of Bromide,
J. Chromatogr. A, 1994, 686, 2, 253-261, https://doi.org/10.1016/0021-9673(94)00719-5
. [all data]
Spiteller and Spiteller, 1979
Spiteller, M.; Spiteller, G.,
Trennung und charakterisierung saurer harnbest and- teile,
J. Chromatogr., 1979, 164, 3, 253-317, https://doi.org/10.1016/S0378-4347(00)81232-3
. [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]
Soderstrom, White, et al., 2001
Soderstrom, M.; White, E.; Abis, L.; Sliwakowski, M.,
Summary report of the eight meeting of the validation group for the updating of the central OPCW analytical database, 28-29 November 2000, CS-2001-2242, Verification Division S/239/2001, 2001, 14. [all data]
Zenkevich, 1999
Zenkevich, I.G.,
Precalculation of Gas Chromatographic Retention Indices of Organic Compounds from Boiling Points of their Structural Analogues,
Zh. Struct. Khim., 1999, 40, 1, 121-130. [all data]
Notes
Go To: Top, Phase change data, Gas Chromatography, References
- Symbols used in this document:
ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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