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Critical pressure

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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

Pc (bar) Reference Comment
27.4 ± 0.3Ambrose and Tsonopoulos, 1995 
27.30Nikitin, Pavlov, et al., 1994Uncertainty assigned by TRC = 0.40 bar; TRC
27.30Nikitin, Pavlov, et al., 1993Uncertainty assigned by TRC = 0.30 bar; TRC
27.30Quadri, Khilar, et al., 1991Uncertainty assigned by TRC = 0.10 bar; TRC
27.34Rosenthal and Teja, 1989Uncertainty assigned by TRC = 0.20 bar; TRC
27.36Teja, Lee, et al., 1989TRC
27.34Brunner, 1988Uncertainty assigned by TRC = 0.05 bar; Visual, optical cell 30cm high. P transducer cal. vs PB.; TRC
27.75Zawisza and Vejrosta, 1982Uncertainty assigned by TRC = 0.05 bar; Visual; TRC
27.60Kobe and Mathews, 1970Uncertainty assigned by TRC = 0.5066 bar; TRC
27.3652Kreglewski and Kay, 1969Uncertainty assigned by TRC = 0.1723 bar; TRC
27.360McMicking and Kay, 1965Uncertainty assigned by TRC = 0.4053 bar; TRC
27.70Kay, 1964Uncertainty assigned by TRC = 0.5066 bar; TRC
27.50Kobe, Crawford, et al., 1955Uncertainty assigned by TRC = 0.345 bar; TRC
27.3031Kay, 1941Uncertainty assigned by TRC = 0.2068 bar; TRC
27.30Kay, 1938Uncertainty assigned by TRC = 1.0342 bar; TRC
27.3577Beattie and Kay, 1937Uncertainty assigned by TRC = 0.0405 bar; based on obs. pvt isotherms; TRC
27.3577Smith, Beattie, et al., 1937Uncertainty assigned by TRC = 0.0506 bar; TRC
28.0164Edgar and Calingaert, 1929Uncertainty assigned by TRC = 0.2026 bar; measured by Keys and Kleinschmidt; TRC; Data excluded from overall average
27.238Young, 1910Uncertainty assigned by TRC = 0.267 bar; TRC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Go To: Top, Critical pressure, Notes

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

Ambrose and Tsonopoulos, 1995
Ambrose, D.; Tsonopoulos, C., Vapor-Liquid Critical Properties of Elements and Compounds. 2. Normal Alkenes, J. Chem. Eng. Data, 1995, 40, 531-546. [all data]

Nikitin, Pavlov, et al., 1994
Nikitin, E.D.; Pavlov, P.A.; Bessonova, N.V., Critical constants of n-alkanes with from 17 to 24 carbon atoms, J. Chem. Thermodyn., 1994, 26, 177-82. [all data]

Nikitin, Pavlov, et al., 1993
Nikitin, E.D.; Pavlov, P.A.; Skripov, P.V., Measurement of the critical properties of thermally unstable substances and mixtures by the pulse-heating method, J. Chem. Thermodyn., 1993, 25, 869-80. [all data]

Quadri, Khilar, et al., 1991
Quadri, S.K.; Khilar, K.C.; Kudchadker, A.P.; Patni, M.J., Measurement of the critical temperatures and critical pressures of some thermally stable or mildly unstable alkanols, J. Chem. Thermodyn., 1991, 23, 67-76. [all data]

Rosenthal and Teja, 1989
Rosenthal, D.J.; Teja, A.S., The Critical Properties of n-Alkanes Using a Low-Residence Time Flow Apparatus, AIChE J., 1989, 35, 1829. [all data]

Teja, Lee, et al., 1989
Teja, A.S.; Lee, R.J.; Rosenthal, D.J.; Anselme, M.J., Correlation of the Critical Properties of Alkanes and Alkanols in 5th IUPAC Conference on Alkanes and AlkanolsGradisca, 1989. [all data]

Brunner, 1988
Brunner, E., Fluid Mixtures at High Pressures VI. Phase Separation and Critical Phenomena in 18 (n-Alkane + Ammonia) and 4 (n-Alkane _ Methanol) Mixtures, J. Chem. Thermodyn., 1988, 20, 273. [all data]

Zawisza and Vejrosta, 1982
Zawisza, A.; Vejrosta, J., High-pressure liquid-vapor equilibria, critical stat, and p(V, T, x) up to 573.15 K and 5.066 MPa for (heptane + propan-1-ol), J. Chem. Thermodyn., 1982, 14, 239-49. [all data]

Kobe and Mathews, 1970
Kobe, K.A.; Mathews, J.F., Critical Properties and Vapor Pressures of Some Organic Nitrogen and Oxygen Compounds, J. Chem. Eng. Data, 1970, 15, 182. [all data]

Kreglewski and Kay, 1969
Kreglewski, A.; Kay, W.B., The Critical Constants of Conformal Mixtures, J. Phys. Chem., 1969, 73, 3359. [all data]

McMicking and Kay, 1965
McMicking, J.H.; Kay, W.B., Vapor Pressures and Saturated Liquid and Vapor Densities of The Isomeric Heptanes and Isomeric Octanes, Proc., Am. Pet. Inst., Sect. 3, 1965, 45, 75-90. [all data]

Kay, 1964
Kay, W.B., P-T-x Diagrams in the Critical Region. Acetone-n-Alkane Systems, J. Phys. Chem., 1964, 68, 827-31. [all data]

Kobe, Crawford, et al., 1955
Kobe, K.A.; Crawford, H.R.; Stephenson, R.W., Critical Properties and Vapor Pressures of Some Ketones, Ind. Eng. Chem., 1955, 47, 1767-72. [all data]

Kay, 1941
Kay, W.B., Liquid-Vapor Equil. Relations in Binary Systems. Butane-Heptane Syst. System, Ind. Eng. Chem., 1941, 33, 590-4. [all data]

Kay, 1938
Kay, W.B., Liquid-Vapor Phase Equilibrium Relations in the Ethane-n-Heptane Syst., Ind. Eng. Chem., 1938, 30, 459-65. [all data]

Beattie and Kay, 1937
Beattie, J.A.; Kay, W.C., The Normal Boiling Point and Critical Constants of Normal Heptane, J. Am. Chem. Soc., 1937, 59, 1586. [all data]

Smith, Beattie, et al., 1937
Smith, L.B.; Beattie, J.A.; Kay, W.C., The compressibility of liquid and gaseous normal heptane and an equation of state for gaseous normal heptane, J. Am. Chem. Soc., 1937, 59, 1587-9. [all data]

Edgar and Calingaert, 1929
Edgar, G.; Calingaert, G., Preparation and Properties of the Isomeric Heptanes II. Physical Prop. properties, J. Am. Chem. Soc., 1929, 51, 1540. [all data]

Young, 1910
Young, S., The Internal Heat of Vaporization constants of thirty pure substances, Sci. Proc. R. Dublin Soc., 1910, 12, 374. [all data]


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