Thiourea

• Formula: CH₄N₂S
• Molecular weight: 76.121
• IUPAC Standard InChI: InChI=1S/CH4N2S/c2-1(3)4/h(H4,2,3,4) Copy

  
• IUPAC Standard InChIKey: UMGDCJDMYOKAJW-UHFFFAOYSA-N Copy
• CAS Registry Number: 62-56-6
• 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.
• Other names: Urea, thio-; β-Thiopseudourea; Pseudothiourea; Pseudourea, 2-thio-; Thiocarbamide; THU; 2-Thiourea; (NH2)2CS; Sulourea; Urea, 2-thio-; USAF EK-497; Isothiourea; Rcra waste number U219; Thiocarbonic acid diamide; Thiomocovina; 2-Thiopseudourea; Tsizp 34; UN 2877; Sulfourea; NSC 5033
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
• Data at other public NIST sites:
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Condensed phase thermochemistry 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

Constant pressure heat capacity of solid

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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of sublimation

Entropy of sublimation

Enthalpy of fusion

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.

Gomez and Sabbah, 1982
Gomez, L.A.T.; Sabbah, R., Thermodynamique de substances soufrees. IV. Etude thermochimique de la thiouree, de la thiosemicarbazide et de la thiocarbohydrazide, Thermochim. Acta, 1982, 57, 67-81. [all data]

Becker and Roth, 1934
Becker, G.; Roth, W.A., Zur bestimmung der verbrennungswarme von organischen schwefelverbindunge, Z. Phys. Chem., 1934, 169, 287-296. [all data]

Sunner, 1946
Sunner, S., Determination of combustion heats of organo-sulphur compounds, Svensk. Kim. Tidr., 1946, 58, 71-81. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Westrum and Chang, 1967
Westrum, E.F., Jr.; Chang, E., Properties thermiques cryogenetiques de la thio-uree ferroelectrique, Colloq. Internat. du, 1967, C.N.R.S. (156), 163-173. [all data]

Torres Gomez and Sabbah, 1982
Torres Gomez, L.A.F.; Sabbah, R., Thermodynamic de substances soufrees. IV. Etude thermochimique de las thiouree, de la thiosemicarbazide et de la thiocarbohydrazide, Thermochim. Acta, 1982, 57, 67-81. [all data]

Kim, Lee, et al., 1994
Kim, K.-J.; Lee, C.-H.; Ryu, S.-K., Solubility of Thiourea in C1 to C6 1-Alcohols, J. Chem. Eng. Data, 1994, 39, 228-30. [all data]

Donnelly, Drewes, et al., 1990
Donnelly, J.R.; Drewes, L.A.; Johnson, R.L.; Munslow, W.D.; Knapp, K.K.; Sovocool, G.W., Purity and heat of fusion data for environmental standards as determined by differential scanning calorimetry, Thermochim. Acta, 1990, 167, 2, 155, https://doi.org/10.1016/0040-6031(90)80476-F . [all data]

Zordan, Hurkot, et al., 1972
Zordan, T.A.; Hurkot, D.G.; Peterson, M.; Hepler, L.G., Enthalpies and entropies of melting from differential scanning calorimetry and freezing point depressions: urea, methylurea, 1, 1-dimethylurea, 1, 3- dimethylurea, tetramethylurea, and thiourea, Thermochim. Acta, 1972, 5, 21. [all data]

Della Gatta, Józwiak, et al., 2000
Della Gatta, Giuseppe; Józwiak, Malgorzata; Brunetti, Bruno; Abate, Lorenzo, Enthalpies and entropies of fusion and of sublimation at the temperature 298.15 K of thiourea and sevenN-alkylthioureas, The Journal of Chemical Thermodynamics, 2000, 32, 8, 979-997, https://doi.org/10.1006/jcht.2000.0662 . [all data]

Ferro, Martino, et al., 1994
Ferro, Daniela; Martino, Rosalba; Gatta, Giuseppe Della, Sublimation enthalpies and entropies of thiourea, 1-methyl-2-thiourea, 1,3-dimethyl-2-thiourea, and 1,1,3,3-tetramethyl-2-thiourea, The Journal of Chemical Thermodynamics, 1994, 26, 2, 183-190, https://doi.org/10.1006/jcht.1994.1037 . [all data]

De Wit, Van Miltenburg, et al., 1983
De Wit, H.G.M.; Van Miltenburg, J.C.; De Kruif, C.G., Thermodynamic properties of molecular organic crystals containing nitrogen, oxygen, and sulphur 1. Vapour pressures and enthalpies of sublimation, The Journal of Chemical Thermodynamics, 1983, 15, 7, 651-663, https://doi.org/10.1016/0021-9614(83)90079-4 . [all data]

Alfonso, Gomez, et al., 1982
Alfonso, Luis; Gomez, Torres; Sabbah, Raphaël, Thermodynamique de substances soufrees. IV. Etude thermochimique de la thiouree, de la thiosemicarbazide et de la thiocarbohydrazide, Thermochimica Acta, 1982, 57, 1, 67-81, https://doi.org/10.1016/0040-6031(82)87024-X . [all data]

Torres, Hernandez-Contreras, et al., 1999
Torres, L.A.; Hernandez-Contreras, I.; Guardado, J.A.; Gonzalez, M.G., A quartz crystal microbalance to determine enthalpies of sublimation at intermediate temperatures by the Knudsen effusion method, Meas. Sci. Technol., 1999, 5, 1, 51-54, https://doi.org/10.1088/0957-0233/5/1/009 . [all data]

Dou, Fuess, et al., 1994
Dou, S.-Q.; Fuess, H.; Schmahl, W.; Strauss, R.; Weiss, A., Orientational order-disorder and phase transition in solid trichloromethane sulfonic acid chloride, Cl3CSO2Cl, Z. Naturforsch., A: Phys. Sci., 1994, 49, 4-5, 594. [all data]

Kim, Lee, et al., 1994, 2
Kim, Kwang-Joo; Lee, Choul-Ho; Ryu, Sheung-Kon, Solubility of Thiourea in C1 to C6 1-Alcohols, J. Chem. Eng. Data, 1994, 39, 2, 228-230, https://doi.org/10.1021/je00014a008 . [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
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  Tfus	Fusion (melting) point
  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation at standard conditions
  ΔsubS	Entropy of sublimation

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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