Barbital

• Formula: C₈H₁₂N₂O₃
• Molecular weight: 184.1925
• IUPAC Standard InChI: InChI=1S/C8H12N2O3/c1-3-8(4-2)5(11)9-7(13)10-6(8)12/h3-4H2,1-2H3,(H2,9,10,11,12,13) Copy

  
• IUPAC Standard InChIKey: FTOAOBMCPZCFFF-UHFFFAOYSA-N Copy
• CAS Registry Number: 57-44-3
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Other names: 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5,5-diethyl-; Barbituric acid, 5,5-diethyl-; Barbitone; Deba; Diemal; Diethylbarbitone; Diethylbarbituric acid; Diethylmalonylurea; Dormonal; Ethylbarbital; Hypnogene; Malonal; Sedeval; Uronal; Veroletten; Veronal; Vesperal; 5,5-Diethylbarbituric acid; Verolettin; Kyselina 5,5-diethylbarbiturova; 5,5-Diethyl-2,4,6(1H,3H,5H)-pyrimidinetrione; NSC 31352; Metharbital M (nor)
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• Information on this page:
  • Phase change data
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of sublimation

Enthalpy of fusion

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Kuffner, Bush, et al., 1957
Kuffner, R.J.; Bush, M.T.; Bircher, L.J., Studies on the surface tension of aqueous barbituric acid solutions, J. Am. Chem. Soc., 1957, 79, 1587-1589. [all data]

Ribeiro da Silva, Ribeiro da Silva, et al., 2009
Ribeiro da Silva, Maria das Dores M.C.; Ribeiro da Silva, Manuel A.V.; Freitas, Vera L.S.; Roux, Maria Victoria; Jiménez, Pilar; Temprado, Manuel; Dávalos, Juan Z.; Cabildo, Pilar; Claramunt, Rosa M.; Elguero, José, Structural studies of cyclic ureas: 3. Enthalpy of formation of barbital, The Journal of Chemical Thermodynamics, 2009, 41, 12, 1400-1407, https://doi.org/10.1016/j.jct.2009.06.018 . [all data]

Chauvet, De Maury, et al., 1986
Chauvet, A.; De Maury, G.; Terol, A.; Masse, J., Etude thermoanalytique de substances psychotropes, Thermochimica Acta, 1986, 97, 143-159, https://doi.org/10.1016/0040-6031(86)87015-0 . [all data]

Notes

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• Symbols used in this document:
  

  Tfus	Fusion (melting) point
  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
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