Phenolphthalein
- Formula: C20H14O4
- Molecular weight: 318.3228
- IUPAC Standard InChIKey: KJFMBFZCATUALV-UHFFFAOYSA-N
- 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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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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tfus | 534.7 | K | N/A | Bebie, 1930 | Uncertainty assigned by TRC = 2. K; TRC |
Tfus | 535.7 | K | N/A | Bebie, 1930 | Uncertainty assigned by TRC = 1.5 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 534. | K | N/A | Grantscharova, Avramov, et al., 1984 | Crystal phase 1 phase; Uncertainty assigned by TRC = 2. K; TRC |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
51.045 | 534. | Grantscharova, Avramov, et al., 1984, 2 | DH |
51.05 | 534. | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
95.6 | 534. | Grantscharova, Avramov, et al., 1984, 2 | DH |
Enthalpy of phase transition
ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
22.594 | 411. | crystaline, II | crystaline, I | Grantscharova, Avramov, et al., 1984, 2 | Amorphous/crystal.; DH |
Entropy of phase transition
ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
55.0 | 411. | crystaline, II | crystaline, I | Grantscharova, Avramov, et al., 1984, 2 | Amorphous/crystal.; DH |
References
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.
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, 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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