- InChI
- InChI=1S/C7H6O4/c8-4-1-2-6(9)5(3-4)7(10)11/h1-3,8-9H,(H,10,11)
- InChI Key
- WXTMDXOMEHJXQO-UHFFFAOYSA-N
- Formula
- C5H11NO2
- SMILES
- O=C(O)c1cc(O)ccc1O
- Molecular Weight1
- 117.15
- CAS
- 490-79-9
- Other Names
-
- 2,5-Dhba
- 2,5-Dioxybenzoic acid
- 2,5-dihydroxybenzoic acid
- 3,6-Dihydroxybenzoic acid
- 5-Hydroxysalicylic acid
- Gensigen
- Gensigon
- Gentisate
- Gentisinic acid
- Hydroquinonecarboxylic acid
- Kyselina 2,5-dihydroxybenzoova
- Kyselina gentisinova
- NSC 27224
- Salicylic acid, 5-hydroxy-
- benzoic acid, 2,5-dihydroxy-
- PAff : Proton affinity (kJ/mol).
- Cp,gas : Ideal gas heat capacity (J/mol×K).
- η : Dynamic viscosity (Pa×s).
- ΔfH°gas : Enthalpy of formation at standard conditions (kJ/mol).
- ΔfusH° : Enthalpy of fusion at standard conditions (kJ/mol).
- ΔfusH : Enthalpy of fusion at a given temperature (kJ/mol).
- ΔsubH° : Enthalpy of sublimation at standard conditions (kJ/mol).
- ΔsubH : Enthalpy of sublimation at a given temperature (kJ/mol).
- IE : Ionization energy (eV).
- log10WS : Log10 of Water solubility in mol/l.
- logPoct/wat : Octanol/Water partition coefficient.
- McVol : McGowan's characteristic volume (ml/mol).
- Psub : Sublimation pressure (kPa).
- Tboil : Normal Boiling Point Temperature (K).
- Tfus : Normal melting (fusion) point (K).
- 1: Molecular weight from the IUPAC atomic weights tables.
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Physical Properties
| Property | Value | Unit | Source |
|---|---|---|---|
| PAff | 531.60 ± 1.30 | kJ/mol | NIST |
| ΔfH°gas | -645.30 | kJ/mol | Relay (1.0) Calculated Property |
| ΔfusH° | 20.80 | kJ/mol | Vapor Pressures and Enthalpies of Combustion of the Dihydroxybenzoic Acid Isomers |
| ΔsubH° | 130.40 ± 1.30 | kJ/mol | NIST |
| IE | 8.46 | eV | Relay (1.0) Calculated Property |
| log10WS | -0.11 | Aq. Solubility Prediction | |
| logPoct/wat | 0.796 | Crippen Calculated Property | |
| McVol | 104.910 | ml/mol | McGowan Calculated Property |
| Tboil | 566.61 | K | Relay (1.0) Calculated Property |
| Tfus | 476.40 | K | Aq. Solubility Prediction |
Cheméo can also estimate Critical Temperature, Critical Pressure, Critical Volume, Enthalpy of vaporization at standard conditions, Standard Gibbs free energy of formation, Acentric Factor for this compound, but they fall outside the models' validated range, so they are not shown here. Open the prediction tool to compute them on demand.
Temperature Dependent Properties
Correlations
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Cp,gas | [144.12; 317.56] | J/mol×K | [273.00; 1000.00] |
Joback Predicted correlation
|
| Equation | Y = A + B·T + C·T² + D·T³ + E·T⁴ Y is Cp,gas in J/mol×K, T in K | |||
| Coefficient A | -5.06200e+01 | |||
| Coefficient B | 9.49900e-01 | |||
| Coefficient C | -9.73520e-04 | |||
| Coefficient D | 3.91800e-07 | |||
| Coefficient E | 0.00000e+00 | |||
| Temperature range, min. | 273.00 | |||
| Temperature range, max. | 1000.00 | |||
| Cp,gas | 144.12 | J/mol×K | 273.00 | Calculated Property |
| Cp,gas | 180.94 | J/mol×K | 353.78 | Calculated Property |
| Cp,gas | 210.48 | J/mol×K | 434.56 | Calculated Property |
| Cp,gas | 233.98 | J/mol×K | 515.33 | Calculated Property |
| Cp,gas | 252.68 | J/mol×K | 596.11 | Calculated Property |
| Cp,gas | 267.82 | J/mol×K | 676.89 | Calculated Property |
| Cp,gas | 280.64 | J/mol×K | 757.67 | Calculated Property |
| Cp,gas | 292.38 | J/mol×K | 838.44 | Calculated Property |
| Cp,gas | 304.27 | J/mol×K | 919.22 | Calculated Property |
| Cp,gas | 317.56 | J/mol×K | 1000.00 | Calculated Property |
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| η | [0.0002093; 0.0000039] | Pa×s | [476.40; 661.15] |
Joback Predicted correlation
|
| Equation | Y = exp(A + B/T + C·ln(T) + D·T^E) Y is η in Pa×s, T in K | |||
| Coefficient A | -2.27403e+01 | |||
| Coefficient B | 6.79748e+03 | |||
| Coefficient C | 0.00000e+00 | |||
| Coefficient D | 0.00000e+00 | |||
| Coefficient E | 0.00000e+00 | |||
| Comment | Liquid phase. Joback/Reid (1987), valid from Tf to 0.7·Tc. | |||
| Temperature range, min. | 476.40 | |||
| Temperature range, max. | 661.15 | |||
| η | 0.0002093 | Pa×s | 476.40 | Calculated Property |
| η | 0.0001161 | Pa×s | 496.93 | Calculated Property |
| η | 0.0000675 | Pa×s | 517.46 | Calculated Property |
| η | 0.0000409 | Pa×s | 537.98 | Calculated Property |
| η | 0.0000257 | Pa×s | 558.51 | Calculated Property |
| η | 0.0000167 | Pa×s | 579.04 | Calculated Property |
| η | 0.0000112 | Pa×s | 599.57 | Calculated Property |
| η | 0.0000077 | Pa×s | 620.10 | Calculated Property |
| η | 0.0000054 | Pa×s | 640.62 | Calculated Property |
| η | 0.0000039 | Pa×s | 661.15 | Calculated Property |
Similar Compounds
Find more compounds similar to Gentisic acid.
Sources
- Cheméo Relay (1.0)
- Cheméo Relay (1.0, beta) Beta: served but experimental, data-limited and below our cross-validation release bar; the Joback value is recommended where available.
- Crippen Method
- Vapor Pressure Characterization of Several Phenolics and Polyhydric Compounds by Knudsen Effusion Method
- Vapor Pressures and Enthalpies of Combustion of the Dihydroxybenzoic Acid Isomers
- Joback Method
- Aqueous Solubility Prediction Method
- McGowan Method
- NIST Webbook
Note: Cheméo is only indexing the data, follow the source links to retrieve the latest data. The source is also providing more information like the publication year, authors and more.
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