Benzene, 2-ethyl-1,3-dimethyl-
- Formula: C10H14
- Molecular weight: 134.2182
- IUPAC Standard InChIKey: CHIKRULMSSADAF-UHFFFAOYSA-N
- CAS Registry Number: 2870-04-4
- 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: m-Xylene, 2-ethyl-; 1,3-Dimethyl-2-ethylbenzene; 2-Ethyl-1,3-dimethylbenzene; 2-ethyl-m-xylene
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Condensed phase thermochemistry data
Go To: Top, Phase change data, 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | -19.15 ± 0.30 | kcal/mol | Ccb | Good, 1975 | |
ΔfH°liquid | -19.84 ± 0.61 | kcal/mol | Ccb | Prosen, Johnson, et al., 1946 | |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -1399.57 ± 0.27 | kcal/mol | Ccb | Good, 1975 | Corresponding ΔfHºliquid = -19.15 kcal/mol (simple calculation by NIST; no Washburn corrections) |
ΔcH°liquid | -1398.90 ± 0.62 | kcal/mol | Ccb | Prosen, Johnson, et al., 1946 | Corresponding ΔfHºliquid = -19.82 kcal/mol (simple calculation by NIST; no Washburn corrections) |
Phase change data
Go To: Top, Condensed phase thermochemistry data, 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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 463.13 ± 0.07 | K | AVG | N/A | Average of 8 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 256.81 | K | N/A | Birch, Dean, et al., 1949 | Uncertainty assigned by TRC = 0.2 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 12.9 | kcal/mol | N/A | Reid, 1972 | AC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
11.7 | 356. | A | Stephenson and Malanowski, 1987 | Based on data from 341. to 493. K.; AC |
11.6 | 314. | N/A | Stull, 1947 | Based on data from 299. to 461. K.; AC |
Mass spectrum (electron ionization)
Go To: Top, Condensed phase thermochemistry data, 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
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Additional Data
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Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
NIST MS number | 3144 |
Gas Chromatography
Go To: Top, Condensed phase thermochemistry data, 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
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | OV-1 | 100. | 1081.6 | Zhu, Zhang, et al., 1999 | Column length: 50. m; Column diameter: 0.25 mm |
Capillary | CP Sil 2 | 80. | 1084.7 | Estel, Mohnke, et al., 1995 | 100. m/0.25 mm/0.25 μm |
Capillary | OV-101 | 100. | 1078. | Matisová, Kovacicová, et al., 1989 | He; Column length: 50. m; Column diameter: 0.20 mm |
Capillary | SE-30 | 70. | 1069.6 | Tóth, 1983 | N2; Column length: 15. m; Column diameter: 0.25 mm |
Capillary | Squalane | 80. | 1064.97 | Soják and Rijks, 1976 | H2; Column length: 100. m; Column diameter: 0.25 mm |
Capillary | SE-30 | 65. | 1070.4 | Svob and Deur-Siftar, 1974 | He; Column length: 25.5 m; Column diameter: 0.5 mm |
Capillary | Squalane | 100. | 1072.0 | Svob and Deur-Siftar, 1974 | He; Column length: 10.5 m; Column diameter: 0.25 mm |
Kovats' RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 1099.2 | Wang, Fingas, et al., 1994 | 30. m/0.32 mm/0.25 μm, He, 50. C @ 2. min, 6. K/min; Tend: 300. C |
Capillary | OV-101 | 1073. | Hayes and Pitzer, 1982 | 110. m/0.25 mm/0.20 μm, He, 1. K/min; Tstart: 35. C; Tend: 200. C |
Capillary | Apiezon L | 1105. | Louis, 1971 | N2, 1. K/min; Column length: 50. m; Column diameter: 0.25 mm; Tstart: 60. C |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Petrocol DH-100 | 1080.75 | Haagen-Smit Laboratory, 1997 | He; Column length: 100. m; Column diameter: 0.2 mm; Program: 5C(10min) => 5C/min => 50C(48min) => 1.5C/min => 195C(91min) |
Capillary | DB-1 | 1082. | Hoekman, 1993 | 60. m/0.32 mm/1.0 μm, He; Program: -40 C for 12 min; -40 - 125 C at 3 deg.min; 125-185 C at 6 deg/min; 185 - 220 C at 20 deg/min; hold 220 C for 2 min |
Kovats' RI, polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | PEG-20M | 70. | 1372.1 | Tóth, 1983 | N2; Column length: 30. m; Column diameter: 0.3 mm |
Capillary | Carbowax 20M | 90. | 1347.5 | Döring, Estel, et al., 1974 | Column length: 100. m; Column diameter: 0.2 mm |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | SPB-5 | 1087. | Engel and Ratel, 2007 | 60. m/0.32 mm/1. μm, 40. C @ 2. min, 3. K/min, 230. C @ 10. min |
Capillary | HP-5MS | 1120. | Kallio, Jussila, et al., 2006 | 20. m/0.25 mm/0.25 μm, 60. C @ 4. min, 5. K/min, 240. C @ 15. min |
Capillary | Petrocol DH | 1081.8 | Censullo, Jones, et al., 2003 | 50. m/0.25 mm/0.5 μm, He, 35. C @ 10. min, 3. K/min, 200. C @ 10. min |
Capillary | DB-5 | 1100.0 | Xu, van Stee, et al., 2003 | 30. m/0.25 mm/1. μm, He, 2.5 K/min; Tstart: 50. C; Tend: 200. C |
Capillary | PONA | 1072.1 | Martos, Saraullo, et al., 1997 | 50. m/0.2 mm/0.5 μm, 35. C @ 0.5 min, 1. K/min, 220. C @ 8. min |
Capillary | PONA | 1075.7 | Martos, Saraullo, et al., 1997 | 50. m/0.2 mm/0.5 μm, 35. C @ 0.5 min, 1. K/min, 220. C @ 8. min |
Capillary | Petrocol DH | 1076. | White, Hackett, et al., 1992 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | OV-101 | 1073. | Hayes and Pitzer, 1981 | 108. m/0.25 mm/0.2 μm, 1. K/min; Tstart: 35. C; Tend: 200. C |
Van Den Dool and Kratz RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | CP-Wax 52CB | 1363. | Liu, Yang, et al., 2001 | H2, 2. K/min; Column length: 50. m; Column diameter: 0.32 mm; Tstart: 50. C; Tend: 200. C |
Normal alkane RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | SE-30 | 100. | 1082. | Vodenkova, Leol'ko, et al., 2005 | He; Column length: 50. m; Column diameter: 0.25 mm |
Capillary | OV-101 | 100. | 1075. | Tian, 1993 | Column length: 50. m; Column diameter: 0.20 mm |
Capillary | OV-101 | 120. | 1081. | Tian, 1993 | Column length: 50. m; Column diameter: 0.20 mm |
Capillary | Squalane | 95.4 | 1061. | Sojak and Vigdergauz, 1978 | H2 |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Polydimethyl siloxane: CP-Sil 5 CB | 1086. | Bramston-Cook, 2013 | 60. m/0.25 mm/1.0 μm, Helium, 45. C @ 1.45 min, 3.6 K/min, 210. C @ 2.72 min |
Capillary | Petrocol DH | 1082. | Supelco, 2012 | 100. m/0.25 mm/0.50 μm, Helium, 20. C @ 15. min, 15. K/min, 220. C @ 30. min |
Capillary | HP-5 MS | 1032. | Jerkovic and Marijanovic, 2010 | 30. m/0.25 mm/0.25 μm, Helium, 70. C @ 2. min, 3. K/min, 200. C @ 18. min |
Capillary | HP-5 | 1029. | Yassa and Akhani, 2008 | 30. m/0.25 mm/0.32 μm, Helium, 60. C @ 30. min, 5. K/min; Tend: 250. C |
Capillary | HP-5 | 1029. | Yassa and Akhani, 2007 | 30. m/0.25 mm/0.32 μm, He, 60. C @ 30. min, 5. K/min; Tend: 250. C |
Capillary | OV-1 | 1074. | Orav, Kailas, et al., 1999 | 2. K/min; Tstart: 50. C; Tend: 160. C |
Capillary | OV-101 | 1075. | Orav, Kailas, et al., 1999, 2 | 50. m/0.20 mm/0.50 μm, Helium, 30. C @ 6. min, 1. K/min; Tend: 100. C |
Capillary | HP-5 | 1097.1 | Wang and Fingas, 1995 | 30. m/0.25 mm/0.25 μm, He, 35. C @ 2. min, 10. K/min, 300. C @ 10. min |
Capillary | DB-1 | 1062. | Ciccioli, Cecinato, et al., 1992 | 60. m/0.32 mm/1.2 μm, He, 30. C @ 10. min, 3. K/min; Tend: 240. C |
Capillary | CP Sil 5 CB | 1072. | Hartgers, Damste, et al., 1992 | 25. m/0.32 mm/0.45 μm, He, 0. C @ 5. min, 3. K/min, 320. C @ 10. min |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Polymethylsiloxane, (PMS-20000) | 1070. | Cornwell and Cordano, 2003 | Program: not specified |
Capillary | SE-30 | 1070. | Xiuhua, Zhang, et al., 1996 | Program: not specified |
Capillary | SE-30 | 1081. | Xiuhua, Zhang, et al., 1996 | Program: not specified |
Capillary | DB-1 | 1086. | Hathcock and Bertsch, 1993 | 100. m/0.25 mm/0.5 μm; Program: not specified |
Capillary | OV-101 | 1080. | Matisová, Juranyiová, et al., 1991 | 52. m/0.25 mm/0.38 μm, H2; Program: 70 - 160 C at 1.5 deg/min; 160 - 280 C at 15 deg/min 15 min at 280 C |
Capillary | OV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc. | 1070. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
Normal alkane RI, polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | Carbowax 20M | 90. | 1348. | Sutter, Peterson, et al., 1997 |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Carbowax 20M | 1372. | Cornwell and Cordano, 2003 | Program: not specified |
Capillary | Carbowax 20M | 1348. | Ivanciuc, Ivanciuc, et al., 2001 | Program: not specified |
Capillary | PEG-20M | 1372. | Xiuhua, Zhang, et al., 1996 | Program: not specified |
Capillary | CP-Wax 52CB | 1355. | Vernin, 1991 | Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
References
Go To: Top, Condensed phase thermochemistry data, 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.
Good, 1975
Good, W.D.,
The standard enthalpies of combustion and formation of n-butylbenzene, the dimethylethylbenzenes, and the tetramethylbenzenes in the condensed state,
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Prosen, Johnson, et al., 1946
Prosen, E.J.; Johnson, W.H.; Rossini, F.D.,
Heats of combustion and formation at 25°C of the alkylbenzenes through C10H14, and of the higher normal monoalkylbenzenes,
J. Res. NBS, 1946, 36, 455-461. [all data]
Birch, Dean, et al., 1949
Birch, S.F.; Dean, R.A.; Fidler, F.A.; Lowry, R.A.,
The preparation of the c(10) monocyclic aromatic hydrocarbons,
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Reid, 1972
Reid, Robert C.,
Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00,
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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
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Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
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Zhu, Zhang, et al., 1999
Zhu, X.; Zhang, L.; Chen, J.; Wang, L.; Che, X.,
The application quantitative structure-retention relationship of GC to aid MS qualitative analysis,
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Estel, Mohnke, et al., 1995
Estel, D.; Mohnke; Biermans; Rotzsche,
The analysis of C4-C11 hydrocarbons in naphtha and reformate with a new apolar fused silica column,
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Matisová, Kovacicová, et al., 1989
Matisová, E.; Kovacicová, E.; Ha, P.T.; Kolek, E.; Engewald, W.,
Identification of alkylbenzenes up to C12 by capillary gas chromatography-mass spectrometry. II. Retention indices on OV-101 columns and retention-molecular structure correlations,
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Tóth, 1983
Tóth, T.,
Use of capillary gas chromatography in collecting retention and chemical information for the analysis of complex petrochemical mixtures,
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Soják and Rijks, 1976
Soják, L.; Rijks, J.A.,
Capillary gas chromatography of alkylbenzenes. I. Some problems encountered with the precision of the retention indcies of alkylbenzenes,
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Svob and Deur-Siftar, 1974
Svob, V.; Deur-Siftar, D.,
Kovats Retention Indices in the Identification of Alkylbenzene Degradation Products,
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Wang, Fingas, et al., 1994
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Fractionation of a light crude oil and identification and quantitation of aliphatic, aromatic, and biomarker comopunds by GC-FID and GC-MS, Part II,
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Hayes and Pitzer, 1982
Hayes, P.C., Jr.; Pitzer, E.W.,
Characterizing petroleum- and shale-derived jet fuel distillates via temperature-programmed Kováts indices,
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Louis, 1971
Louis, R.,
Kovats-index-tafeln zur gaschromatographischen analyse von kohlenwasserstoffgemischen,
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Haagen-Smit Laboratory, 1997
Haagen-Smit Laboratory,
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Hoekman, S.K.,
Improved gas chromatography procedure for speciated hydrocarbon measurements of vehicle emissions,
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Kapillar-gaschromatographische Charakterisierung von C10-bis C12-Aromaten,
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Correction of the data generated by mass spectrometry analyses of biological tissues: Application to food authentication,
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Speciation of the volatile organic compounds (VOCs) in solventborne aerosol coatings by solid phase microextraction-gas chromatography,
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Estimation of air/coating distribution coefficients for solid phase microextraction using retention indexes from linear temperature-programmed capillary gas chromatography. Application to the sampling and analysis of total petroleum hydrocarbons in air,
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Liu, T.-T.; Yang, T.-S.; Wu, C.-M.,
Changes of volatiles in soy sauce-stewed pork during cold storage and reheating,
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Kovats indices and normal boiling points of alkylbenzenes,
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Tian, 1993
Tian, S.,
Analysis of the tower bottom oil of dimethylbenzene rectifying tower and C9 aromatic hydrocarbon fraction by capillary gas chromatography,
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Sojak and Vigdergauz, 1978
Sojak, L.; Vigdergauz, M.S.,
Comparison of interpolation methods for the interpretation of retention data in gas chromatography,
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Bramston-Cook, 2013
Bramston-Cook, R.,
Kovats indices for C2-C13 hydrocarbons and selected oxygenated/halocarbons with 100 % dimethylpolysiloxane columns, 2013, retrieved from http://lotusinstruments.com/monographs/List .... [all data]
Supelco, 2012
Supelco, CatalogNo. 24160-U,
Petrocol DH Columns. Catalog No. 24160-U, 2012, retrieved from http://www.sigmaaldrich.com/etc/medialib/docs/Supelco/Datasheet/1/w97949.Par.0001.File.tmp/w97949.pdf. [all data]
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Jerkovic, I.; Marijanovic, Z.,
Oak (Quercus frainetto Ten.) honeydaw honey - approach to screening of volatile organic composition and antioxidant capacity (DPPH and FRAP assay),
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Yassa, N.; Akhani, H.,
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Yassa and Akhani, 2007
Yassa, N.; Akhani, H.,
The essential oils composition in two species of the genus Eriocycla Lindl. (Apiaceae) from Iran, 2007, retrieved from http://biology.ut.ac.ir/members/akhani/PdfReprintNumber/27.pdf. [all data]
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Orav, A.; Kailas, T.; Muurisepp, M.; Kann, J.,
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Orav, A.; Kailas, T.; Muurisepp, M.; Kann, J.,
Composition of the oil from waste tires. 1. Fraction boiling at yp to 160 0C,
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Wang, Z.; Fingas, M.,
Differentiation of the source of spilled oil and monitoring of the oil weathering process using gas chromatography-mass spectrometry,
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Ciccioli, Cecinato, et al., 1992
Ciccioli, P.; Cecinato, A.; Brancaleoni, E.; Frattoni, M.; Liberti, A.,
Use of carbon adsorption traps combined with high resolution gas chromatography - mass spectrometry for the analysis of polar and non-polar C4-C14 hydrocarbons involved in photochemical smog formation,
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Hartgers, Damste, et al., 1992
Hartgers, W.A.; Damste, J.S.S.; de Leeuw, J.W.,
Identification of C2-C4 alkylated benzenes in flash pyrolysates of kerogens, coals and asphaltenes,
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Cornwell and Cordano, 2003
Cornwell, E.; Cordano, G.,
Nueva proposicion para predecir datos de retencion obtenidos mediante cromatografia de gases de hidrocarburos derivados de las naftas,
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Xiuhua, Zh.; Zhang, L.; Che, X.,
Prediction of the Kovats retention indexes of polysubstituted alkylbenzenes,
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Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions 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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