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4-Chlorophthalic anhydride

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4-Chlorophthalic anhydride
Names
Preferred IUPAC name 5-Chloro-2-benzofuran-1,3-dione
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.003.866 Edit this at Wikidata
PubChem CID
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/C8H3ClO3/c9-4-1-2-5-6(3-4)8(11)12-7(5)10/h1-3HKey: BTTRMCQEPDPCPA-UHFFFAOYSA-N
  • InChI=1/C8H3ClO3/c9-4-1-2-5-6(3-4)8(11)12-7(5)10/h1-3HKey: BTTRMCQEPDPCPA-UHFFFAOYAB
SMILES
  • Clc1ccc2C(=O)OC(=O)c2c1
Properties
Chemical formula C8H3ClO3
Molar mass 182.56 g·mol
Melting point ~99 °C
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

4-Chlorophthalic anhydride is a monochlorinated aromatic anhydride. It is an isomer of 3-chlorophthalic anhydride and a derivative of phthalic anhydride.

Properties

It has a melting point of around 99 °C. Like most acid anhydrides, it can hydrolyze in the presence of water.

Production

It can be produced by chlorination of phthalic anhydride.

Applications

It may be used to produce herbicides and pesticides, intermediates for active pharmaceutical ingredients and can be used as a monomer for the production of polyimides.

References

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