4-Aminobenzoic acid
- Formula: C7H7NO2
- Molecular weight: 137.1360
- IUPAC Standard InChI: InChI=1S/C7H7NO2/c8-6-3-1-5(2-4-6)7(9)10/h1-4H,8H2,(H,9,10)
- IUPAC Standard InChIKey: ALYNCZNDIQEVRV-UHFFFAOYSA-N
- CAS Registry Number: 150-13-0
- 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: p-Aminobenzoic acid; Aminobenzoic Acid; Benzoic acid, 4-amino-; Benzoic acid, p-amino-; p-Carboxyaniline; p-Carboxyphenylamine; Amben; anti-Chromotrichia Factor; Anticanitic vitamin; Chromotrichia factor; Hachemina; Pabacyd; Pabafilm; Pabamine; Paraminol; Paranate; PAB; PABA; Trichochromogenic Factor; Vitamin BX; Vitamin H'; 4-Carboxyaniline; γ-Aminobenzoic acid; Aminobenzoic acid, para; Bacterial vitamin H1; Pabanol; Super Shade by Coppertone; 1-Amino-4-carboxybenzene; Kyselina p-aminobenzoova; Sunbrella; RVPaba Lipstick; para-Aminobenzoic acid; Romavit; Aniline-4-carboxylic acid; Anticantic vitamin; Pabagel; component of Presun; 8014-65-1; component of Presun (Salt/Mix)
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Condensed phase thermochemistry data
Go To: Top, IR Spectrum, Gas Chromatography, 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 | -97.99 ± 0.41 | kcal/mol | Ccr | Nabavian, Sabbah, et al., 1977 | Author was aware that data differs from previously reported values; ALS |
| ΔfH°solid | -98.8 ± 0.1 | kcal/mol | Ccb | Lebedeva, Gutner, et al., 1971 | Hfusion=5.0±0.1, see Lebedeva, Rjadnenko, et al., 1969; ALS |
| ΔfH°solid | -78.47 | kcal/mol | Ccb | Pushkareva and Kokoshko, 1946 | Author's hf298_condensed=-81.5 kcal/mol, used C as diamond; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -799.47 ± 0.35 | kcal/mol | Ccr | Nabavian, Sabbah, et al., 1977 | Author was aware that data differs from previously reported values; ALS |
| ΔcH°solid | -798.7 ± 0.1 | kcal/mol | Ccb | Lebedeva, Gutner, et al., 1971 | Hfusion=5.0±0.1, see Lebedeva, Rjadnenko, et al., 1969; ALS |
| ΔcH°solid | -819.0 | kcal/mol | Ccb | Pushkareva and Kokoshko, 1946 | Author's hf298_condensed=-81.5 kcal/mol, used C as diamond; ALS |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 44.79 | 323. | Satoh and Sogabe, 1941 | T = 0 to 100 C. Mean value.; DH |
| 42.50 | 298. | Andrews, Lynn, et al., 1926 | T = 22 to 190 C.; DH |
IR Spectrum
Go To: Top, Condensed phase thermochemistry data, Gas Chromatography, References, Notes
Data compiled by: Coblentz Society, Inc.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Gas Chromatography
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, References, Notes
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
Normal alkane RI, non-polar column, custom temperature program
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Other | Methyl Silicone | 1547. | Ardrey and Moffat, 1981 | Program: not specified |
References
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Nabavian, Sabbah, et al., 1977
Nabavian, P.M.; Sabbah, R.; Chastel, R.; Laffitte, M.,
Thermodynamique de composes azotes. II. Etude thermochimique des acides aminobenzoiques, de la pyrimidine, de l'uracile et de la thymine.,
J. Chim. Phys., 1977, 74, 115-126. [all data]
Lebedeva, Gutner, et al., 1971
Lebedeva, N.D.; Gutner, N.M.; Ryadnenko, V.L.,
Heats of combustion and formation of certain aromatic amino-derivatives,
Russ. J. Phys. Chem. (Engl. Transl.), 1971, 45, 561-562. [all data]
Lebedeva, Rjadnenko, et al., 1969
Lebedeva, N.D.; Rjadnenko, B.L.; Gutner, N.M.,
Heats of formation of some N-containing organic compounds,
Int. Conf. Calorim. Therm. (Warsaw, Poland), 1969, 1-8. [all data]
Pushkareva and Kokoshko, 1946
Pushkareva, Z.V.; Kokoshko, Z.U.,
On the question of the relation between the structure and bacteriostatic activity of sulphanilamide compounds. I. The resonance energy of some sulphanilamide compounds,
Zh. Obshch. Kim., 1946, 16, 1269-1278. [all data]
Satoh and Sogabe, 1941
Satoh, S.; Sogabe, T.,
The heat capacities of some organic compounds containing nitrogen and the atomic heat of nitrogen. (2), Sci.,
Pap. Inst. Phys. Chem. Res. (Tokyo), 1941, 38, 231-237. [all data]
Andrews, Lynn, et al., 1926
Andrews, D.H.; Lynn, G.; Johnston, J.,
The heat capacities and heat of crystallization of some isomeric aromatic compounds,
J. Am. Chem. Soc., 1926, 48, 1274-1287. [all data]
Ardrey and Moffat, 1981
Ardrey, R.E.; Moffat, A.C.,
Gas-liquid chromatographic retention indices of 1318 substances of toxicological interest on SE-30 or OV-1 stationary phase,
J. Chromatogr., 1981, 220, 3, 195-252, https://doi.org/10.1016/S0021-9673(00)81925-1
. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Gas Chromatography, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid 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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