Imidodicarbonic diamide
- Formula: C2H5N3O2
- Molecular weight: 103.0800
- IUPAC Standard InChI: InChI=1S/C2H5N3O2/c3-1(6)5-2(4)7/h(H5,3,4,5,6,7)
- IUPAC Standard InChIKey: OHJMTUPIZMNBFR-UHFFFAOYSA-N
- CAS Registry Number: 108-19-0
- 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: Allophanamide; Allophanic acid amide; Allophanimidic acid; Biuret; Carbamylurea; Dicarbamylamine; Isobiuret; Urea, (aminocarbonyl)-; Ureidoformamide; L-101; NSC 8020
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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:
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 |
|---|---|---|---|---|---|
| ΔsubH° | 126.7 ± 1.9 | kJ/mol | V | Kozyro, Frenkel, et al., 1988 | ALS |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.970 | 372. | crystaline, II | crystaline, I | Kozyro, Frenkel', et al., 1988 | DH |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 2.54 | 372. | crystaline, II | crystaline, I | Kozyro, Frenkel', et al., 1988 | 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.
Kozyro, Frenkel, et al., 1988
Kozyro, A.A.; Frenkel, M.L.; Krasulin, A.P.; Simirskii, V.V.; Kabo, G.Ya.,
Thermodynamic properties of biuret in different states of aggregation,
Russ. J. Phys. Chem. (Engl. Transl.), 1988, 62, 897-899. [all data]
Kozyro, Frenkel', et al., 1988
Kozyro, A.A.; Frenkel', M.L.; Krasulin, A.P.; Simirskii, V.V.; Kabo, G.Ya.,
Thermodynamic properties of biuret in different states of aggregation,
Zhur. Fiz. Khim., 1988, 62, 1752-1756. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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