1,4-Benzenediol, 2-methyl-
- Formula: C7H8O2
- Molecular weight: 124.1372
- IUPAC Standard InChIKey: CNHDIAIOKMXOLK-UHFFFAOYSA-N
- CAS Registry Number: 95-71-6
- 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. - Species with the same structure:
- Other names: Hydroquinone, methyl-; p-Toluhydroquinol; p-Toluhydroquinone; p-Toluquinol; Methyl-p-hydroquinone; Methylhydroquinone; Toluhydroquinone; Toluquinol; Tolylhydroquinone; THQ; 2-Methyl-1,4-Benzenediol; 2-Methylhydroquinone; 2,5-Dihydroxytoluene; 1,4-Dihydroxy-2-methylbenzene; 2,5-Toluenediol; 2-Methyl-p-hydroquinone; 2-Methyl-1,4-hydroquinone; NSC 4962; 2-Methyl-1,4-benzenediol (2-methylhydroquinone)
- Information on this page:
- Other data available:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Condensed phase thermochemistry data
Go To: Top, Phase change data, 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 |
---|---|---|---|---|---|
ΔcH°solid | -834.7 | kcal/mol | Ccb | Swietoslawski and Starczedska, 1925 | Corresponding ΔfHºsolid = -96.9 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of solid
Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
41.80 | 323. | Satoh and Sogabe, 1941 | T = 0 to 100 C. Mean value.; DH |
Phase change data
Go To: Top, Condensed phase thermochemistry data, 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: William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔsubH° | 25.91 ± 0.93 | kcal/mol | ME | Ribeiro da Silva and Lobo Ferreira, 2009 | Based on data from 325. to 341. K. |
ΔsubH° | 24.00 ± 0.33 | kcal/mol | GS | Verevkin, 1999 | Based on data from 333. to 368. K. |
Enthalpy of sublimation
ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
25.76 ± 0.26 | 333. | ME | Ribeiro da Silva and Lobo Ferreira, 2009 | Based on data from 325. to 341. K. |
23.2 ± 0.33 | 351. | GS | Verevkin, 1999 | Based on data from 333. to 368. K. |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Method | Reference |
---|---|---|---|
6.60 | 404.2 | DSC | Verevkin, 1999 |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Swietoslawski and Starczedska, 1925
Swietoslawski, W.; Starczedska, H.,
Correction des donnees thermochimiques de M.A. Valeur,
J. Chem. Phys., 1925, 22, 399-401. [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. (3), Sci.,
Pap. Inst. Phys. Chem. Res. (Tokyo), 1941, 38, 238-245. [all data]
Ribeiro da Silva and Lobo Ferreira, 2009
Ribeiro da Silva, Manuel A.V.; Lobo Ferreira, Ana I.M.C.,
Experimental standard molar enthalpies of formation of some methylbenzenediol isomers,
The Journal of Chemical Thermodynamics, 2009, 41, 10, 1096-1103, https://doi.org/10.1016/j.jct.2009.04.015
. [all data]
Verevkin, 1999
Verevkin, Sergey P.,
Substituent effects on the benzene ring. Prediction of the thermochemical properties of alkyl substituted hydroquinones,
Phys. Chem. Chem. Phys., 1999, 1, 1, 127-131, https://doi.org/10.1039/a806706f
. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔcH°solid Enthalpy of combustion of solid at standard conditions 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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.