Dimethyl maleate

Dimethyl maleate
Skeletal formula of dimethyl maleate
Ball-and-stick model of the dimethyl maleate molecule
Names
IUPAC name
Dimethyl (Z)-but-2-enedioate
Other names
maleic acid dimethyl ester, methyl maleate, sipomer DMM, 2-Butenedioic acid, dimethyl ester, 2-Butenedioic acid (Z)-,dimethyl ester
Identifiers
624-48-6 YesY
ChEBI CHEBI:35460 YesY
ChemSpider 4436352 YesY
EC Number 210-848-5
Jmol interactive 3D Image
Properties
C6H8O4
Molar mass 144.13 g/mol
Appearance clear, colorless, oily liquid
Density 1.15 g/cm3
Melting point −17 °C (1 °F; 256 K)
Boiling point 204 to 207 °C (399 to 405 °F; 477 to 480 K)
slightly soluble
Hazards
Harmful (H)
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oil Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
1
1
0
Flash point 95 °C (203 °F; 368 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Dimethyl maleate is an organic compound with the formula C6H8O4. It is the (Z)-isomer of the dimethyl ester of fumaric acid.

Synthesis

Dimethyl maleate can be synthesized from maleic anhydride and methanol, with sulfuric acid acting as acid catalyst, via a nucleophilic acyl substitution for the monomethyl ester, followed by a Fischer esterification reaction for the dimethyl ester.

Applications

Dimethyl maleate is used in many organic syntheses as a dienophile for diene synthesis. It is used as an additive and intermediate for plastics, pigments, pharmaceuticals, and agricultural products. It is also an intermediate for the production of paints, adhesives, and copolymers.[1]

Dimethyl maleate has also found use in applications where improvements in the hardness and toughness of polymer films are desired. This includes, in particular, the improvement of anti-blocking properties of copolymers of vinyl acetate with DMM. It is also used as an internal modifier to increase the glass transition temperature of styrene or vinyl chloride polymers.[2]

Chemistry

Hydrolysis of dimethyl maleate gives maleic acid, or possibly the maleic acid monomethyl ester. Hydration of the same compound gives malic acid.

See also

References

  1. ↑ "Dimethyl maleate", Chemical Land 21
  2. ↑ "Dimethyl maleate", Bimax Chemicals Ltd.
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