4-Chlorophthalic anhydride

4-Chlorophthalic anhydride
Names
	Preferred IUPAC name 5-Chloro-2-benzofuran-1,3-dione
Identifiers
CAS Number	118-45-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	60395 ;
ECHA InfoCard	100.003.866
PubChem CID	67044;
UNII	BPI93D0O61 ;
CompTox Dashboard (EPA)	DTXSID30151993 ;
	InChI InChI=1S/C8H3ClO3/c9-4-1-2-5-6(3-4)8(11)12-7(5)10/h1-3H Key: BTTRMCQEPDPCPA-UHFFFAOYSA-N ; InChI=1/C8H3ClO3/c9-4-1-2-5-6(3-4)8(11)12-7(5)10/h1-3H Key: BTTRMCQEPDPCPA-UHFFFAOYAB;
	SMILES Clc1ccc2C(=O)OC(=O)c2c1;
Properties
Chemical formula	C8H3ClO3
Molar mass	182.56 g·mol−1
Melting point	~99 °C
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

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

Properties edit

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

Production edit

It can be produced by chlorination of phthalic anhydride.

Applications edit

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 edit

Chlorination of phthalic anhydride http://www.freepatentsonline.com/4297283.html