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Benzoic acid, 4-methoxy-

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Phase change data

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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, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tfus456.15KN/AAnonymous, 1988Uncertainty assigned by TRC = 1. K; nominal value, from the catalog; TRC
Tfus456.75KN/AMarsh, 1987Uncertainty assigned by TRC = 0.2 K; recommended as fixed point for thermometry; TRC
Tfus457.8KN/AArmstrong, James, et al., 1979Uncertainty assigned by TRC = 0.5 K; TRC
Tfus457.KN/AHerbert, 1967Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
Deltavap22.kcal/molSub-FusPerlovich, Volkova, et al., 2008AC
Quantity Value Units Method Reference Comment
Deltasub26.7 ± 0.1kcal/molGSPerlovich, Volkova, et al., 2008Based on data from 316. - 369. K.; AC
Deltasub26.2 ± 0.1kcal/molMEStephenson and Malanowski, 1987See also Colomina, Jimenez, et al., 1978.; AC
Deltasub26.24kcal/molN/AColomina, Jimenez, et al., 1978DRB

Enthalpy of sublimation

DeltasubH (kcal/mol) Temperature (K) Method Reference Comment
26.2 ± 0.1334.61VColomina, Jimenez, et al., 1978ALS

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Method Reference Comment
6.7710456.70N/ASabbah and El Watik, 1992DH
7.15455.6DSCPerlovich, Volkova, et al., 2008AC
6.79457.8N/AAcree, 1991AC

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, Phase change data, Notes

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

Anonymous, 1988
Anonymous, X., , NBS Spec. Publ. (U. S.) 260, 1988. [all data]

Marsh, 1987
Marsh, K.N., Recommended Reference Materials for the Realization of Physicochemical Properties, Blackwell Sci. Pub., Oxford, 1987. [all data]

Armstrong, James, et al., 1979
Armstrong, N.A.; James, K.C.; Wong, C.K., Inter-relationships between solubilities, distribution coefficients and melting points of some substituted benzoic and phenylacetic acids, J. Pharm. Pharmacol., 1979, 31, 1, 627, https://doi.org/10.1111/j.2042-7158.1979.tb13606.x . [all data]

Herbert, 1967
Herbert, A.J., Transition temperatures and transition energies of the p-n-alkoxy benzoic acids, from n-propyl to n-octadecyl, Trans. Faraday Soc., 1967, 63, 555, https://doi.org/10.1039/tf9676300555 . [all data]

Perlovich, Volkova, et al., 2008
Perlovich, German L.; Volkova, Tatyana V.; Manin, Alex N.; Bauer-Brandl, Annette, Extent and mechanism of solvation and partitioning of isomers of substituted benzoic acids: A thermodynamic study in the solid state and in solution, J. Pharm. Sci., 2008, 97, 9, 3883-3896, https://doi.org/10.1002/jps.21260 . [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]

Colomina, Jimenez, et al., 1978
Colomina, M.; Jimenez, P.; Roux, M.V.; Turrion, C., Thermochemical properties of benzoic acid derivatives VII. Enthalpies of combustion and formation of the o-, m-, and p-methoxy-benzoic acids, J. Chem. Thermodyn., 1978, 10, 661-665. [all data]

Sabbah and El Watik, 1992
Sabbah, R.; El Watik, L., New reference materials for the calibration (temperature and energy) of differential thermal analysers and scanning calorimeters, J. Therm. Anal., 1992, 38(4), 855-863. [all data]

Acree, 1991
Acree, William E., Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation, Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H . [all data]


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