Benzoic acid, 3,4-dihydroxy-
- Formula: C7H6O4
- Molecular weight: 154.1201
- IUPAC Standard InChI: InChI=1S/C7H6O4/c8-5-2-1-4(7(10)11)3-6(5)9/h1-3,8-9H,(H,10,11)
- IUPAC Standard InChIKey: YQUVCSBJEUQKSH-UHFFFAOYSA-N
- CAS Registry Number: 99-50-3
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Protocatechuic acid; 3,4-Dihydroxybenzoic acid; 4-Carboxy-1,2-dihydroxybenzene
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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 by: William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 32.29 ± 0.29 | kcal/mol | ME | Monte, Gonc«807»alves, et al., 2010 | Based on data from 387. to 403. K. |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 31.62 ± 0.29 | 395. | ME | Monte, Gonc«807»alves, et al., 2010 | Based on data from 387. to 403. K. |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Method | Reference |
|---|---|---|---|
| 7.46 | 472.3 | DSC | Queimada, Mota, et al., 2009 |
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.
Monte, Gonc«807»alves, et al., 2010
Monte, Manuel J.S.; Gonc«807»alves, Mariana V.; Ribeiro da Silva, Maria D.M.C.,
Vapor Pressures and Enthalpies of Combustion of the Dihydroxybenzoic Acid Isomers,
J. Chem. Eng. Data, 2010, 55, 6, 2246-2251, https://doi.org/10.1021/je900777q
. [all data]
Queimada, Mota, et al., 2009
Queimada, Antonio J.; Mota, Fatima L.; Pinho, Simao P.; Macedo, Eugenia A.,
Solubilities of Biologically Active Phenolic Compounds: Measurements and Modeling,
J. Phys. Chem. B, 2009, 113, 11, 3469-3476, https://doi.org/10.1021/jp808683y
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
ΔfusH Enthalpy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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