Maleic Acid
Maleic acid or cis-butenedioic acid is an organic compound that is a dicarboxylic acid, a molecule with
two carboxyl groups. Its chemical formula is HO2CCH=CHCO2H. Maleic acid is the cis-isomer of
butenedioic acid, whereas fumaric acid is the trans-isomer. It is mainly used as a precursor to fumaric
acid, and relative to its parent maleic anhydride, maleic acid has few applications.
Physical properties
Maleic acid is a less stable molecule than fumaric acid. The difference in heat of combustion is 22.7
kJ/mole. The heat of combustion is -1355 kJ/mole.[4]Maleic acid is more soluble in water than fumaric
acid. The melting point of maleic acid (135 °C) is also much lower than that of fumaric acid (287 °C). Both
properties of maleic acid can be explained on account of the intramolecular hydrogen bonding[5] that
takes place in maleic acid at the expense of intermolecular interactions, and that is not possible in
fumaric acid for geometric reasons.
Dubichem chemicals international is a leading supplier, manufacturer and exporter of Maleic acid in
Dubai, Ajman, Abu Dubai, Sharjah, Fujairah, Turkey, Saudi Arabia, Qatar, Kuwait, United Arab Emirates,
omen, Iraq, Singapore, Malaysia, Indonesia, Lebanon, Greece, India, Sudan, Ghana, Madagascar, Kenya,
Nigeria, Zimbabwe, at [email protected] and for more related products visit www.dubichem.com
