3-Chlorophthalic anhydride

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3-Chlorophthalic anhydride
File:3-Chlorophthalic anhydride.png
style="background: #F8EABA; text-align: center;" colspan="2" | Identifiers
CAS number 117-21-5
style="background: #F8EABA; text-align: center;" colspan="2" | Properties
Molecular formula C8H3ClO3
Molar mass 182.56 g mol−1
Melting point

~123 °C

Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

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


3-Chlorophthalic anhydride has a melting point of around 123 °C. It may hydrolize in presence of water.


3-Chlorophthalic anhydride 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.

See also