Acetaminophen

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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, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tfus441.2KN/AManzo and Ahumanda, 1990Uncertainty assigned by TRC = 0.5 K; TRC
Tfus441.KN/AEl-Banna, 1978Uncertainty assigned by TRC = 2. K; TRC
Quantity Value Units Method Reference Comment
ΔsubH°138. ± 3.kJ/molFus+VapVecchio and Tomassetti, 2009AC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
103. ± 3.521.TGAVecchio and Tomassetti, 2009AC
99. ± 1.494.TGAVecchio and Tomassetti, 2009AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Method Reference Comment
27.6443.2DSCMota, Carneiro, et al., 2009AC
27.0440.3DSCVecchio and Tomassetti, 2009AC
26.49441.9AC,DSCXu, Sun, et al., 2006AC
26.2443.DSCRomero, Bustamante, et al., 2004AC
26.02441.2N/AManzo and Ahumada, 1990AC

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:

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

Data compiled by: Timothy J. Johnson, Tanya L. Myers, Yin-Fong Su, Russell G. Tonkyn, Molly Rose K. Kelly-Gorham, and Tyler O. Danby

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

Mass spectrum (electron ionization)

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

Spectrum

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Mass spectrum
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Additional Data

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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.
Origin Japan AIST/NIMC Database- Spectrum MS-IW-3901
NIST MS number 229798

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.

References

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

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

Manzo and Ahumanda, 1990
Manzo, R.H.; Ahumanda, A.A., Effects of solvent medium on solubility. V: Enthalpic and entropic contributions to the free energy changes of Di-substituted benzene derivatives in ethanol: Water and ethanol: Cyclohexane mixtures, J. Pharm. Sci., 1990, 79, 12, 1109, https://doi.org/10.1002/jps.2600791214 . [all data]

El-Banna, 1978
El-Banna, H.M., Solid Dispersion of Pharmaceutaical Ternary Systems I. Phase Diagrams of Aspirin- Acetominophen-Urea Systems, J. Pharm. Sci., 1978, 67, 1109. [all data]

Vecchio and Tomassetti, 2009
Vecchio, Stefano; Tomassetti, Mauro, Vapor pressures and standard molar enthalpies, entropies and Gibbs energies of sublimation of three 4-substituted acetanilide derivatives, Fluid Phase Equilibria, 2009, 279, 1, 64-72, https://doi.org/10.1016/j.fluid.2009.02.001 . [all data]

Mota, Carneiro, et al., 2009
Mota, Fátima L.; Carneiro, Aristides P.; Queimada, António J.; Pinho, Simão P.; Macedo, Eugénia A., Temperature and solvent effects in the solubility of some pharmaceutical compounds: Measurements and modeling, European Journal of Pharmaceutical Sciences, 2009, 37, 3-4, 499-507, https://doi.org/10.1016/j.ejps.2009.04.009 . [all data]

Xu, Sun, et al., 2006
Xu, F.; Sun, L.X.; Tan, Z.C.; Liang, J.G.; Zhang, T., Adiabatic calorimetry and thermal analysis on acetaminophen, J Therm Anal Calorim, 2006, 83, 1, 187-191, https://doi.org/10.1007/s10973-005-6969-0 . [all data]

Romero, Bustamante, et al., 2004
Romero, S.; Bustamante, P.; Escalera, B.; Cirri, M.; Mura, P., Characterization of the solid phases of paracetamol and fenamates at equilibrium in saturated solutions, Journal of Thermal Analysis and Calorimetry, 2004, 77, 2, 541-554, https://doi.org/10.1023/B:JTAN.0000038993.61782.ba . [all data]

Manzo and Ahumada, 1990
Manzo, Ruben H.; Ahumada, Amelia A., Effects of solvent medium on solubility. V: Enthalpic and entropic contributions to the free energy changes of Di-substituted benzene derivatives in ethanol: Water and ethanol: Cyclohexane mixtures, J. Pharm. Sci., 1990, 79, 12, 1109-1115, https://doi.org/10.1002/jps.2600791214 . [all data]

Notes

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