Urea, trimethyl-
- Formula: C4H10N2O
- Molecular weight: 102.1350
- IUPAC Standard InChIKey: COSWCAGTKRUTQV-UHFFFAOYSA-N
- CAS Registry Number: 632-14-4
- 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: N,N,N'-Trimethylurea; N,N'-Dimethyl-N-methylurea; Trimethylurea; 1,1,3-Trimethylurea; (CH3)2NCONHCH3; Urea, 1,1,3-trimethyl-; Trimethylharnstoff
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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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 505.7 | K | N/A | Weast and Grasselli, 1989 | BS |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
400. to 401. | 0.021 | Frinton Laboratories Inc., 1986 | BS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
21.4 ± 0.29 | 360. | Piacente, Ferro, et al., 1990 | Based on data from 345. to 375. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
3.4178 | 344.4 | Della Gatta and Ferro, 1987 | DH |
3.42 | 344.4 | Acree, 1991 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
9.92 | 344.4 | Della Gatta and Ferro, 1987 | DH |
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.
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]
Frinton Laboratories Inc., 1986
Frinton Laboratories Inc.,
Catalog Number 11, Frinton Laboratories Inc., Vineland, NJ, 1986, 99. [all data]
Piacente, Ferro, et al., 1990
Piacente, V.; Ferro, D.; Gatta, G. Della,
Sublimation enthalpy of eleven alkyl derivatives of urea,
Thermochimica Acta, 1990, 158, 1, 79-85, https://doi.org/10.1016/0040-6031(90)80054-3
. [all data]
Della Gatta and Ferro, 1987
Della Gatta, G.; Ferro, D.,
Enthalpies of fusion and solid-to-solid transition, entropies of fusion for urea and twelve alkylureas,
Thermochim. Acta, 1987, 122, 143-152. [all data]
Acree, 1991
Acree, William E.,
Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation,
Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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