Propanoic acid, 2-methyl-

• Formula: C₄H₈O₂
• Molecular weight: 88.1051
• IUPAC Standard InChI: InChI=1S/C4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6) Copy

  
• IUPAC Standard InChIKey: KQNPFQTWMSNSAP-UHFFFAOYSA-N Copy
• CAS Registry Number: 79-31-2
• 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: Isobutyric acid; α-Methylpropanoic acid; α-Methylpropionic acid; Dimethylacetic acid; Isobutanoic acid; Isopropylformic acid; 2-Methylpropanoic acid; 2-Methylpropionic acid; iso-C3H7COOH; Acetic acid, dimethyl-; Cenex RP b2; Propionic acid, 2-methyl-; Tenox IBP 2; Kyselina isomaselna; UN 2529; Methylpropanoic acid; Methylpropionic acid; 2-Propanecarboxylic acid; i-Butyric acid; NSC 62780
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• Information on this page:
  • Normal boiling point
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
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Normal boiling point

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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
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

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.

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]

Lark, Banipal, et al., 1987
Lark, B.S.; Banipal, T.S.; Singh, S., Excess Gibbs Energy for Binary Mixtures Containing Carboxylic Acids 3. Excess Gibbs Energy for Isobutyric Acid and Trimethylacetic Acid + Cyclohexane and n-Heptane, J. Chem. Eng. Data, 1987, 32, 402. [all data]

Radwan and Hanna, 1976
Radwan, M.H.; Hanna, A.A., Binary Azeotropes Containing Butyric Acid, J. Chem. Eng. Data, 1976, 21, 285-8. [all data]

Friedman and Cotton, 1962
Friedman, B.S.; Cotton, S.M., J. Org. Chem., 1962, 27, 481. [all data]

Toland, 1961
Toland, W.G., J. Org. Chem., 1961, 26, 2929. [all data]

Hagemeyer and DeCroes, 1953
Hagemeyer, H.J.; DeCroes, G.C., The Chemistry Of Isobutyraldehyde and Its Derivatives, Eastman Co., Tenn., 1953. [all data]

Mosher and Kehr, 1953
Mosher; Kehr, J. Am. Chem. Soc., 1953, 75, 3172. [all data]

Cook, 1952
Cook, N.C., , Unpublished, Final Rep. Stand. Proj. on Oxygenated Compounds, Penn. State Univ., College Park, PA, 1952. [all data]

James and Martin, 1952
James, A.T.; Martin, A.J.P., Biochem. J., 1952, 50, 679. [all data]

Hausermann, 1951
Hausermann, M., Helv. Chim. Acta, 1951, 34, 1211. [all data]

Tomecko and Hatcher, 1951
Tomecko, J.W.; Hatcher, W.H., Trans. R. Soc. Can., 1951, 45, 39. [all data]

Lecat, 1949
Lecat, M., Tables Azeotropiques, Vol. 1, 10th ed., Brussels, Belgium, 1949. [all data]

Everett and Pinsent, 1948
Everett, D.H.; Pinsent, B.R.W., J. Chem. Soc., 1948, 1948, 1029. [all data]

Pines and Ipatieff, 1947
Pines, H.; Ipatieff, V.N., J. Am. Chem. Soc., 1947, 69, 1337. [all data]

Sato, Barry, et al., 1947
Sato, Y.; Barry, G.T.; Craig, L.C., Identification of Small Amounts of ORganic Compounds by Distribution Studies VII. Separation and Estimation of Normal Fatty Acids, J. Biol. Chem., 1947, 170, 501. [all data]

Simons and Werner, 1942
Simons, J.H.; Werner, A.C., J. Am. Chem. Soc., 1942, 64, 1356. [all data]

Allsopp and Willis, 1936
Allsopp, C.B.; Willis, H.F., Refractive Dispersion of Organic Compounds VIII. Isomers of the Formula C4H8O2: Dioxane, Ethyl Acetate, Isobutyric Acid, and Acetoin, Proc. R. Soc. London, A, 1936, 153, 392. [all data]

Timmermans and Delcourt, 1934
Timmermans, J.; Delcourt, Y., Work of the International Bureau of Physico-Chemical Standards.VI. Physical Constants of Twenty Organic Compounds., J. Chim. Phys. Phys.-Chim. Biol., 1934, 31, 85-121. [all data]

Van Risseghem, 1933
Van Risseghem, H., Bull. Soc. Chim. Belg., 1933, 42, 219. [all data]

Kopper, Seka, et al., 1932
Kopper, H.; Seka, R.; Kohlraush, K.W.F., Monatsh. Chem., 1932, 61, 397. [all data]

Seib, 1927
Seib, J., Chem. Ber., 1927, 60, 1390. [all data]

Timmermans, 1922
Timmermans, J., Mutual solubilities of liquids at high pressures, Arch. Neerl. Sci. Exactes Nat., Ser. 3A, 1922, 6, 147-51. [all data]

Levene and Allen, 1916
Levene, P.A.; Allen, C.H., J. Biol. Chem., 1916, 27, 433. [all data]

Timmermans, 1912
Timmermans, J., Experimental Research on the Density of Liquids Below 0 Degrees., Sci. Proc. R. Dublin Soc., 1912, 13, 310. [all data]

Timmermans, 1911
Timmermans, J., Researches on the freezing point of organic liquid compounds, Bull. Soc. Chim. Belg., 1911, 25, 300. [all data]

Parnas, 1910
Parnas, J., Biochem. Z., 1910, 28, 274. [all data]

Timmermans, 1910
Timmermans, J., The Purification and Physical Constants of Several Organic Liquids, Bull. Soc. Chim. Belg., 1910, 24, 244. [all data]

Fournier, 1909
Fournier, H., Bull. Soc. Chim. Fr., 1909, 5, 920. [all data]

Sommelet, 1906
Sommelet, M., Ann. Chim. Phys., 1906, 9, 484. [all data]

Nef, 1901
Nef, J.V., Justus Liebigs Ann. Chem., 1901, 318, 137. [all data]

Franke, 1895
Franke, E., Z. Phys. Chem. (Leipzig), 1895, 16, 477. [all data]

Poletaeff, 1891
Poletaeff, G., Chem. Ber., 1891, 24, 1308. [all data]

Wagner, 1891
Wagner, G., J. Prakt. Chem., 1891, 44, 257. [all data]

Behal, 1888
Behal, A., Ann. Chim. Phys., 1888, 15, 267. [all data]

Kahlbaum, 1884
Kahlbaum, G.W.A., The dependence of Boiling Temperature on Air Pressure, Ber. Dtsch. Chem. Ges., 1884, 17, 1245. [all data]

Perkin, 1884
Perkin, W.H., On the Magnetic Rotary Polarisation of Compounds in Relation to their Chemical Consitution; with Observations on the Preparation and Relative Densities of the Bodies Examined, J. Chem. Soc., 1884, 45, 421-580. [all data]

Zander, 1884
Zander, A., The specific volumes of liquid compounds: IV normal fatty acids and normal fatty alcohols, Justus Liebigs Ann. Chem., 1884, 224, 56-95. [all data]

Von Reis, 1881
Von Reis, M.A., IV. The Specific Heat of Liquid Organic Compounds and its Relation to Molecular Weight., Ann. Phys. (Leipzig), 1881, 13, 447. [all data]

Linnemann and von Zotta, 1872
Linnemann, E.; von Zotta, V., Conversion of Normal Butyl Alcohol into Isobutyl Alcohol or Butyl Alcohol of Fermentation, Justus Liebigs Ann. Chem., 1872, 162, 3. [all data]

Markownikov, 1866
Markownikov, W., Justus Liebigs Ann. Chem., 1866, 138, 361. [all data]

Notes

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• Symbols used in this document:
  

  Tboil

  Boiling point

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