Indene

Indene
Names
	Preferred IUPAC name 1H-Indene
	Other names Benzocyclopentadiene; Indonaphthene; Bicyclo[4.3.0]nona-1,3,5,7-tetraene
Identifiers
CAS Number	95-13-6 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	635873
ChEBI	CHEBI:41921 ;
ChEMBL	ChEMBL192812 ;
ChemSpider	6949 ;
DrugBank	DB02815 ;
ECHA InfoCard	100.002.176
EC Number	202-393-6;
Gmelin Reference	27265
KEGG	C11565 ;
PubChem CID	7219;
UNII	67H8Y6LB8A ;
CompTox Dashboard (EPA)	DTXSID8042052 ;
	InChI InChI=1S/C9H8/c1-2-5-9-7-3-6-8(9)4-1/h1-6H,7H2 Key: YBYIRNPNPLQARY-UHFFFAOYSA-N ; InChI=1/C9H8/c1-2-5-9-7-3-6-8(9)4-1/h1-6H,7H2 Key: YBYIRNPNPLQARY-UHFFFAOYAJ;
	SMILES c1ccc2c(c1)CC=C2;
Properties
Chemical formula	C9H8
Molar mass	116.16
Appearance	Colorless liquid
Density	0.997 g/mL
Melting point	−1.8 °C (28.8 °F; 271.3 K)
Boiling point	181.6 °C (358.9 °F; 454.8 K)
Solubility in water	Insoluble
Acidity (pKa)	20.1 (in DMSO)
Magnetic susceptibility (χ)	−80.89×10−6 cm3/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Flammable
Flash point	78.3 °C (172.9 °F; 351.4 K)
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 10 ppm (45 mg/m3)
IDLH (Immediate danger)	N.D.
Related compounds
Related compounds	Benzofuran, Benzothiophene, Indole
	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

Indene is an aromatic, polycyclic hydrocarbon with chemical formula C₉H₈. It is composed of a benzene ring fused with a cyclopentene ring. This flammable liquid is colorless although samples often are pale yellow. The principal industrial use of indene is in the production of indene/coumarone thermoplastic resins. Substituted indenes and their closely related indane derivatives are important structural motifs found in many natural products and biologically active molecules, such as sulindac.

Names


Preferred IUPAC name 1H-Indene
Other names Benzocyclopentadiene Indonaphthene Bicyclo[4.3.0]nona-1,3,5,7-tetraene
Identifiers
CAS Number	95-13-6^Y
3D model (JSmol)	Interactive image
Beilstein Reference	635873
ChEBI	CHEBI:41921^Y
ChEMBL	ChEMBL192812^Y
ChemSpider	6949^Y
DrugBank	DB02815^Y
ECHA InfoCard	100.002.176
EC Number	202-393-6
Gmelin Reference	27265
KEGG	C11565^Y
PubChem CID	7219
UNII	67H8Y6LB8A^Y
CompTox Dashboard (EPA)	DTXSID8042052
InChI InChI=1S/C9H8/c1-2-5-9-7-3-6-8(9)4-1/h1-6H,7H2^Y Key: YBYIRNPNPLQARY-UHFFFAOYSA-N^Y InChI=1/C9H8/c1-2-5-9-7-3-6-8(9)4-1/h1-6H,7H2 Key: YBYIRNPNPLQARY-UHFFFAOYAJ
SMILES c1ccc2c(c1)CC=C2
Properties
Chemical formula	C₉H₈
Molar mass	116.16
Appearance	Colorless liquid
Density	0.997 g/mL
Melting point	−1.8 °C (28.8 °F; 271.3 K)
Boiling point	181.6 °C (358.9 °F; 454.8 K)
Solubility in water	Insoluble
Acidity (pK_a)	20.1 (in DMSO)
Magnetic susceptibility (χ)	−80.89×10⁻⁶ cm³/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Flammable
Flash point	78.3 °C (172.9 °F; 351.4 K)
NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 10 ppm (45 mg/m³)
IDLH (Immediate danger)	N.D.
Related compounds
Related compounds	Benzofuran, Benzothiophene, Indole
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references