Phenolphthalein

• Formula: C₂₀H₁₄O₄
• Molecular weight: 318.3228
• IUPAC Standard InChI: InChI=1S/C20H14O4/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12,21-22H Copy

  
• IUPAC Standard InChIKey: KJFMBFZCATUALV-UHFFFAOYSA-N Copy
• CAS Registry Number: 77-09-8
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-; Euchessina; Koprol; Laxogen; Lilo; Phthalimetten; Purga; Purgophen; Spulmako-lax; Trilax; 3,3-Bis(4-hydroxyphenyl)phthalide; Phenolphthalein,white; Phenolphthalein,yellow; Phenophthalein; 3,3-Bis(p-hydroxyphenyl)phthalide; Chocolax; Espotabs; Feen-A-Mint Gum; NCI-C55798; Phenolax; Phthalide 3,3,-bis(p-hydroxyphenyl)-; .alpha, alpha.-Di(p-hydroxyphenyl)phthalide; Dihydroxyphthalophenone; Evac-Q-kit; Evac-Q-kwik; Evac-U-gen; Fenolftalein; Purgen; Evac-Q-Tabs; Ex-Lax; 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone; NSC 10464; Phthalin; component of Agoral; Feen-A-Mint Laxative Mints; Phillips Gelcaps; Alophen; Doxidan; 3,3-Bis(4-hydroxyphenyl)-2-benzofuran-1(3h)-one
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• Information on this page:
  • Phase change data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
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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
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of fusion

Entropy of fusion

Enthalpy of phase transition

Entropy of phase transition

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• Not specified, most likely a prism, grating, or hybrid spectrometer.; (NO SPECTRUM, ONLY SCANNED IMAGE IS AVAILABLE)

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

• solid; Bruker Tensor 37 FTIR; 0.96450084 cm^-1 resolution

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

• gas

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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Additional Data

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.

Bebie, 1930
Bebie, J., Suggestions Related to U. S. P. X Revision, J. Am. Pharm. Assoc., 1930, 19, 371. [all data]

Grantscharova, Avramov, et al., 1984
Grantscharova, E.; Avramov, I.; Gutzow, I., Thermodynamic behavior of amorphous and crystalline phenolphthalein, Dokl. Bolg. Akad. Nauk, 1984, 37, 1521-3. [all data]

Grantscharova, Avramov, et al., 1984, 2
Grantscharova, E.; Avramov, I.; Gutzow, I., Thermodynamic behavior of amorphous and crystalline phenolphthalein, Dokl. Bolg. Akad. Nauk, 1984, 37, 1521-1523. [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Notes

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

• Symbols used in this document:
  

  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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