Malic Acid

• Formula: C₄H₆O₅
• Molecular weight: 134.0874
• IUPAC Standard InChI: InChI=1S/C4H6O5/c5-2(4(8)9)1-3(6)7/h2,5H,1H2,(H,6,7)(H,8,9) Copy

  
• IUPAC Standard InChIKey: BJEPYKJPYRNKOW-UHFFFAOYSA-N Copy
• CAS Registry Number: 6915-15-7
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Stereoisomers:
  • D-malic acid
  • Butanedioic acid, hydroxy-, (S)-
• Other names: Butanedioic acid, hydroxy-; α-Hydroxysuccinic acid; Hydroxyethane-1,2-dicarboxylic acid; Hydroxysuccinic acid; Pomalus acid; dl-Malic acid; Deoxytetraric acid; Kyselina hydroxybutandiova; Kyselina jablecna; Succinic acid, hydroxy-; Hydroxybutanedioic acid; (.+/-.)-Malic acid; 2-Hydroxyethane-1,2-dicarboxylic acid; Butanedioic acid, 2-hydroxy-; FDA 2018; Musashi-no-Ringosan; NSC 25941; R,S(.+/-.)-Malic acid; Apple acid (Salt/Mix)
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• Information on this page:
  • Phase change data
  • References
  • Notes
• Other data available:
  • Henry's Law data
  • Mass spectrum (electron ionization)
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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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of phase transition

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.

Wilhoit and Shiao, 1964
Wilhoit, R.C.; Shiao, D., Thermochemistry of Biologically Important Compounds. Heats of Combustion of Solid Organic Acids, J. Chem. Eng. Data, 1964, 9, 595. [all data]

Ceolin, Szwarc, et al., 1990
Ceolin, R.; Szwarc, H.; Lepage, F., On the dimorphism of DL-malic acid, Thermochim. Acta, 1990, 158(2), 347-352. [all data]

Notes

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• Symbols used in this document:
  

  Tfus	Fusion (melting) point
  ΔHtrs	Enthalpy of phase transition

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