Acenaphthene

Acenaphthene
IUPAC name 1,2-Dihydroacenaphthylene
Other names 1,8-Ethylenenaphthalene peri-Ethylenenaphthalene Naphthyleneethylene
Identifiers
CAS number	83-32-9 Y
PubChem	6734
ChemSpider	6478 Y
UNII	V8UT1GAC5Y Y
EC number	201-469-6
UN number	3077
KEGG	C19312 N
ChEBI	CHEBI:22154 Y
RTECS number	AB1000000
Jmol-3D images	Image 1 Image 2
SMILES c2cc1cccc3c1c(c2)CC3 c1cc2cccc3c2c(c1)CC3
InChI InChI=1S/C12H10/c1-3-9-4-2-6-11-8-7-10(5-1)12(9)11/h1-6H,7-8H2 Y Key: CWRYPZZKDGJXCA-UHFFFAOYSA-N Y InChI=1/C12H10/c1-3-9-4-2-6-11-8-7-10(5-1)12(9)11/h1-6H,7-8H2 Key: CWRYPZZKDGJXCA-UHFFFAOYAW
Properties
Molecular formula	C12H10
Molar mass	154.21 g mol−1
Appearance	White or pale yellow crystalline powder
Density	1.222
Melting point	93.4 °C, 367 K, 200 °F
Boiling point	279 °C, 552 K, 534 °F
Solubility in water	0.4 mg/100 ml
Solubility in ethanol	slight
Solubility in chloroform	slight
Solubility in benzene	very soluble
Solubility in acetic acid	soluble
Hazards
MSDS	ICSC 1674
EU Index	Not listed
NFPA 704	1 2 1
Flash point	135 °C
Autoignition temperature	>450 °C
N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Acenaphthene is a polycyclic aromatic hydrocarbon (PAH) consisting of naphthalene with an ethylene bridge connecting positions 1 and 8. An alternative name, 1,2-dihydroacenaphthylene, emphasizes that it is a hydrogenated form of acenaphthylene. It is a constituent of coal tar.

Acenaphthene was prepared the first time from coal tar by Marcellin Berthelot and after that with Bardy he synthesized it from α-ethyl naphthalene.

It is used in preparation of dyes, pesticides and pharmaceuticals.

It does not appear to be carcinogenic.

External links

• Method for sampling and analysis
• Chemical land datasheet
• MSDS at Oxford University
• National Pollutant Inventory - Polycyclic Aromatic Hydrocarbon Fact Sheet
• Entry in PAH database