- Maleic acid or
(Z)-butenedioic acid or cis-butenedioic acid or malenic acid or maleinic
acid or toxilic acid is an organic compound that is a
dicarboxylic
acid.
- The molecule consists
of an ethylene group flanked by two carboxylic acid groups. Maleic acid
is the cis isomer of butenedioic acid, whereas fumaric acid is the trans
isomer.
- The cis isomer is
the less stable one of the two; the difference in heat of combustion is
22.7 kJ/mol.
- The physical properties
of maleic acid are very different from those of fumaric acid.
- Maleic acid is soluble
in water, whereas fumaric acid is not; and the melting point of maleic
acid (130 - 139 °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 that takes place at the expense of
intermolecular
interactions.
- Maleic acid should not
be confused with malic acid or malonic acid, both of which are different
types of dicarboxylic acids. In biology the
compound goes by the
name ionised maleate.
- In industry, maleic
acid is derived from maleic anhydride by hydrolysis. Maleic anhydride is
produced from benzene or butane in an oxidation process.
- Maleic acid esters are
also called maleates, for instance dimethyl maleate.Maleic acid is an
industrial raw material for the production of glyoxylic acid by
ozonolysis.
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General
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- Information about Maleic Acid
- Description about Maleic Acid
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MSDS &
Product
- Toxilic acid
- Maleic Acid
- (Z)-Butenedioic
acid
- Fact Sheet of Maleic
Acid
- Material safety data
sheet for Maleic Acid
- Extraction tablets
- Maleic Acid MSDS
- Maleic Acid product list
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Maleic
acid ReagentPlus
Patent
- Acrylic acid-Maleic acid copolymer, its
production process and use
- Maleic acid based copolymer its production
process and use
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Application
-
Studies on the properties of the
variants of gamma-glutamyl transpeptidase in human urine
-
The Influence of Admixtures on the
Rheological Properties of Mortars
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Effect of humidity on vibrational
properties of chemically modified wood
Process & Properties
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Synthesis of fenoprofen and
gemfibrozil styrene-maleic acid copolymer conjugates
Compatibility of polyvinyl alcohol and
poly(methyl vinyl ether-co-maleic acid) blends estimated by molecular
dynamics
Chemical and
Physical Properties of Ammonium Sulfate/Organic Aerosols
Amphiphilic Maleic Acid-Containing
Alternating Copolymers— Dissociation Behavior and Compositions
Geometric
Isomers
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