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. 2018 Mar 24;310(6):475–483. doi: 10.1007/s00403-018-1825-9

Table 1.

Chemical structure and basic properties of free FA and the FAEs: DMF, MEF and three salts of MEF

(Adapted from Brennan et al. [10])

Compound Molecular formula Molecular weight Melting points (ºC) Water solubility (ng/mL) Acid dissociation constant (pKa) Molecular structure
DMF C6H8O4 144.13 102 1 No ionizable protons graphic file with name 403_2018_1825_Figa_HTML.gif
FA C4H4O4 116.07 graphic file with name 403_2018_1825_Figb_HTML.gif
MEF C6H8O4 144.13 graphic file with name 403_2018_1825_Figc_HTML.gif
MEF-Ca C12H14CaO8 326.31 285 294 3.3 graphic file with name 403_2018_1825_Figd_HTML.gif
MEF-Zn C12H14O8Zn 351.62 300 300 3.3 graphic file with name 403_2018_1825_Fige_HTML.gif
MEF-Mg C12H14MgO8 310.54 169 826 3.3 graphic file with name 403_2018_1825_Figf_HTML.gif