Phthalide

Phthalide
Names
	Preferred IUPAC name 2-Benzofuran-1(3H)-one
	Other names Phthalolactone
Identifiers
CAS Number	87-41-2 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:38085;
ChemSpider	6621;
ECHA InfoCard	100.001.586
PubChem CID	6885;
UNII	8VV922U86J;
CompTox Dashboard (EPA)	DTXSID0052594 ;
	InChI InChI=1S/C8H6O2/c9-8-7-4-2-1-3-6(7)5-10-8/h1-4H,5H2 Key: WNZQDUSMALZDQF-UHFFFAOYSA-N; InChI=1/C8H6O2/c9-8-7-4-2-1-3-6(7)5-10-8/h1-4H,5H2 Key: WNZQDUSMALZDQF-UHFFFAOYAW;
	SMILES O=C1OCc2ccccc12;
Properties
Chemical formula	C8H6O2
Molar mass	134.134 g·mol−1
Melting point	75 to 77 °C (167 to 171 °F; 348 to 350 K)
Boiling point	290 °C (554 °F; 563 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Phthalide is an organic chemical compound with the molecular formula C₈H₆O₂. It is a white solid and the simplest benzo lactone. It is prepared from hydroxymethylbenzoic acid.