Isoindene
{{Chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 424687672
| ImageFile = Isoindene.png
| ImageClass = skin-invert-image
| ImageSize = 150px
| ImageName = Skeletal formula
| ImageFile1 = Isoindene-3D-balls.png
| ImageName1 = Ball-and-stick model
| PIN = 2H-Indene
| OtherNames = 2H-Isoindene
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 270-53-1
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = QF4FM9ZP7E
| SMILES = C12=CCC=C1C=CC=C2
| PubChem = 444084
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
| ChemSpiderID = 392097
| InChI = 1/C9H8/c1-2-5-9-7-3-6-8(9)4-1/h1-2,4-7H,3H2
| InChIKey = BQTJMKIHKULPCZ-UHFFFAOYAS
| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/C9H8/c1-2-5-9-7-3-6-8(9)4-1/h1-2,4-7H,3H2
| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
| StdInChIKey = BQTJMKIHKULPCZ-UHFFFAOYSA-N
| RTECS =
| MeSHName =
| ChEBI_Ref = {{ebicite|changed|EBI}}
| ChEBI = 33054
}}
|Section2={{Chembox Properties
| C=9 | H=8
| Appearance =
| Density =
| MeltingPt =
| BoilingPt =
| Solubility = }}
|Section3={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt = }}
}}
Isoindene is a flammable polycyclic hydrocarbon with chemical formula C9H8. It is composed of a cyclohexadiene ring fused with a cyclopentadiene ring.