Definition of maleic acid in English:

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maleic acid

Pronunciation: /məˈlēik/ /-ˈlā-/


A crystalline acid made by distilling malic acid and used in making synthetic resins.
  • Alternative name: cis-butenedioic acid; chemical formula: HOOCCHCHCOOH
Example sentences
  • Citric acid, maleic acid, and butanetetracarboxylic acid are the three agents used most often.
  • Moreover the molecules of maleic acid are polar and are easily hydrated by the polar water molecules.
  • If released into water, maleic acid will probably biodegrade based on the results of screening studies.


Mid 19th century: maleic from French maléique, alteration of malique (see malic acid).

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