1,3-Benzodioxole-5-carboxylic acid
- Formula: C8H6O4
- Molecular weight: 166.1308
- IUPAC Standard InChI: InChI=1S/C8H6O4/c9-8(10)5-1-2-6-7(3-5)12-4-11-6/h1-3H,4H2,(H,9,10)
- IUPAC Standard InChIKey: VDVJGIYXDVPQLP-UHFFFAOYSA-N
- CAS Registry Number: 94-53-1
- 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: Piperonylic acid; Benzoic acid, 3,4-(methylenedioxy)-; Heliotropic acid; Protocatechuic acid methylene ether; 3,4-Methylenedioxybenzoic acid; 1,3-Benzodioxole-5-carboxylic acid (piperonylic acid)
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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° | 117.2 ± 1.8 | kJ/mol | ME | Matos, Monte, et al., 2004 | Based on data from 363. - 377. K. |
Enthalpy of sublimation
| ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 113.6 ± 1.1 | 370. | ME | Matos, Monte, et al., 2004 | Based on data from 363. - 377. K. |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Reference |
|---|---|---|
| 30.5 | 501.6 | Matos, Monte, et al., 2004 |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Matos, Monte, et al., 2004
Matos, M. Agostinha R.; Monte, Manuel J.S.; Sousa, Clara C.S.; Almeida, Ana R.R.P.; Morais, Victor M.F.,
Thermodynamic study of sesamol, piperonyl alcohol, piperonylic acid and homopiperonylic acid: a combined experimental and theoretical investigation,
Org. Biomol. Chem., 2004, 2, 6, 908, https://doi.org/10.1039/b400107a
. [all data]
Notes
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- 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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