Phthalic anhydride
- Formula: C8H4O3
- Molecular weight: 148.1156
- IUPAC Standard InChI: InChI=1S/C8H4O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-4H
- IUPAC Standard InChIKey: LGRFSURHDFAFJT-UHFFFAOYSA-N
- CAS Registry Number: 85-44-9
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: 1,3-Isobenzofurandione; ESEN; Phthalandione; Phthalic acid anhydride; Retarder AK; Retarder ESEN; Retarder PD; TGL 6525; Vulkalent B/C; 1,2-Benzenedicarboxylic anhydride; 1,3-Phthalandione; 1,2-Benzenedicarboxylic acid anhydride; 1,3-Dioxophthalan; o-Phthalic acid anhydride; Anhydride phtalique; Anidride ftalica; Ftaalzuuranhydride; Ftalowy bezwodnik; Isobenzofuran, 1,3-dihydro-1,3-dioxo-; NCI-C03601; Phthalsaeureanhydrid; Anhydrid kyseliny ftalove; Ftalanhydrid; Rcra waste number U190; Araldite HT 901; Phthalanhydride; Sconoc 7; HT 901; Isobenzofuran-1,3-dione; Retarder PX; NSC 10431
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Condensed phase thermochemistry data
Go To: Top, References, Notes
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:
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 |
|---|---|---|---|---|---|
| ΔfH°solid | -110.03 | kcal/mol | Ccb | Parks, Mosley, et al., 1950 | see Richardson and Parks, 1939; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -779.02 | kcal/mol | Ccb | Parks, Mosley, et al., 1950 | see Richardson and Parks, 1939; Corresponding ΔfHºsolid = -110.02 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 43.02 | cal/mol*K | N/A | Busygina, Maslova, et al., 1987 | DH |
| S°solid,1 bar | 42.90 | cal/mol*K | N/A | Parks, Todd, et al., 1936 | Extrapolation below 90 K, 58.12 J/mol*K.; DH |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 38.24 | 298.15 | Busygina, Maslova, et al., 1987 | T = 13 to 350 K.; DH |
| 38.671 | 298.1 | Parks, Todd, et al., 1936 | T = 90 to 300 K.; DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Parks, Mosley, et al., 1950
Parks, G.S.; Mosley, J.R.; Peterson, P.V., Jr.,
Heats of combustion and formation of some organic compounds containing oxygen,
J. Chem. Phys., 1950, 18, 152. [all data]
Richardson and Parks, 1939
Richardson, J.W.; Parks, G.S.,
Thermal data on organic compounds. XIX. Modern combustion data for some non-volatile compounds containing carbon, hydrogen and oxygen,
J. Am. Chem. Soc., 1939, 61, 3543-3546. [all data]
Busygina, Maslova, et al., 1987
Busygina, G.I.; Maslova, V.A.; Shvetsova, K.G.; Babinkov, A.G.; Rabinovich, I.B.; Karyakin, N.V.,
Specific heat and thermodynamic functions of phthalic anhydride and 2-ethylhexanol at 13-350 K,
Zhur. Fiz. Khim., 1987, 61, 2347-2351. [all data]
Parks, Todd, et al., 1936
Parks, G.S.; Todd, S.S.; Moore, W.A.,
Thermal data on organic compounds. XVI. Some heat capacity, entropy and free energy data for typical benzene derivatives and heterocyclic compounds,
J. Am. Chem. Soc., 1936, 58, 398-401. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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