1,2-Benzenediol, 3-methyl-
- Formula: C7H8O2
- Molecular weight: 124.1372
- IUPAC Standard InChI: InChI=1S/C7H8O2/c1-5-3-2-4-6(8)7(5)9/h2-4,8-9H,1H3
- IUPAC Standard InChIKey: PGSWEKYNAOWQDF-UHFFFAOYSA-N
- CAS Registry Number: 488-17-5
- 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: Pyrocatechol, 3-methyl-; 1,2-Dihydroxy-3-methylbenzene; 2,3-Dihydroxytoluene; 3-Methyl-1,2-benzenediol; 3-Methyl-1,2-dihydroxybenzene; 3-Methylcatechol; 3-Methylpyrocatechol; Catechol, 3-methyl-; 2,3-Toluenediol; 2-Hydroxy-3-methylphenol; NSC 66523; 3-Methyl-1,2-benzenediol (3-methylpyrocatechol); Dihydroxytoluene (Related)
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- 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.
Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -71.53 ± 0.38 | kcal/mol | Ccb | Ribeiro Da Silva and Ribeiro Da Silva, 1984 | see Ribeiro da Silva, Ribeiro da Silva, et al., 1984 |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -93.81 ± 0.26 | kcal/mol | Ccb | Ribeiro Da Silva and Ribeiro Da Silva, 1984 | see Ribeiro da Silva, Ribeiro da Silva, et al., 1984 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -837.8 ± 0.1 | kcal/mol | Ccb | Ribeiro Da Silva and Ribeiro Da Silva, 1984 | see Ribeiro da Silva, Ribeiro da Silva, et al., 1984; Corresponding ΔfHºsolid = -93.81 kcal/mol (simple calculation by NIST; no Washburn corrections) |
Phase change data
Go To: Top, Gas phase thermochemistry data, 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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 514.2 | K | N/A | Weast and Grasselli, 1989 | BS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔsubH° | 22.3 ± 0.24 | kcal/mol | C | Carson, 1984 | AC |
| ΔsubH° | 22.3 ± 0.24 | kcal/mol | C | Ribeiro Da Silva and Ribeiro Da Silva, 1984 | see Ribeiro da Silva, Ribeiro da Silva, et al., 1984; ALS |
| ΔsubH° | 22.3 | kcal/mol | N/A | Ribeiro Da Silva and Ribeiro Da Silva, 1984 | DRB |
References
Go To: Top, Gas phase thermochemistry data, 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.
Ribeiro Da Silva and Ribeiro Da Silva, 1984
Ribeiro Da Silva, M.D.M.C.; Ribeiro Da Silva, M.A.V.,
Enthalpies of combustion of 1,2-dihydroxybenzene and of six alkylsubstituted 1,2-dihydroxybenzenes,
J. Chem. Thermodyn., 1984, 16, 1149-1155. [all data]
Ribeiro da Silva, Ribeiro da Silva, et al., 1984
Ribeiro da Silva, M.A.V.; Ribeiro da Silva, M.D.M.C.; Pilcher, G.,
The construction, calibration and use of a new high-precision static-bomb calorimeter,
Rev. Port. Quim., 1984, 26, 163-172. [all data]
Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]
Carson, 1984
Carson, A.S.,
The molar enthalpy of dehydration of Cr2(O2CCH3)4·2H2O(cr) and the molar enthalpies of sublimation of Cr2(O2CCH3)4(cr), Mo2(O2CCH3)4(cr), and Mo2(O2CCF3)4(cr),
The Journal of Chemical Thermodynamics, 1984, 16, 5, 427-429, https://doi.org/10.1016/0021-9614(84)90198-8
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Tboil Boiling point ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions 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.