Acenaphthylene

Acenaphthylene
Names
	Preferred IUPAC name Acenaphthylene
	Other names Cyclopenta[de]naphthalene; Acenaphthalene; Tricyclo[6.3.1.04,12]dodeca-1(12),2,4,6,8,10-hexaene; Tricyclo[6.3.1.04,12]dodecahexaene
Identifiers
CAS Number	208-96-8 ;
3D model (JSmol)	Interactive image; Interactive image;
ChEBI	CHEBI:33081 ;
ChemSpider	8807 ;
ECHA InfoCard	100.005.380
PubChem CID	9161;
UNII	1Z25C36811 ;
CompTox Dashboard (EPA)	DTXSID3023845 ;
	InChI InChI=1S/C12H8/c1-3-9-4-2-6-11-8-7-10(5-1)12(9)11/h1-8H Key: HXGDTGSAIMULJN-UHFFFAOYSA-N ; InChI=1/C12H8/c1-3-9-4-2-6-11-8-7-10(5-1)12(9)11/h1-8H Key: HXGDTGSAIMULJN-UHFFFAOYAQ;
	SMILES c3cc1cccc2\C=C/c(c12)c3; c1cc2cccc3c2c(c1)C=C3;
Properties
Chemical formula	C12H8
Molar mass	152.196 g·mol−1
Appearance	Yellow crystals
Density	0.8987 g cm−3
Melting point	91.8 °C (197.2 °F; 364.9 K)
Boiling point	280 °C (536 °F; 553 K)
Solubility in water	Insoluble
Solubility in ethanol	very soluble
Solubility in diethyl ether	very soluble
Solubility in benzene	very soluble
Solubility in chloroform	soluble
Thermochemistry[1]
Heat capacity (C)	166.4 J mol−1 K−1
Enthalpy of fusion (ΔfH⦵fus)	186.7 kJ/mol
Enthalpy of vaporization (ΔfHvap)	69 kJ/mol
Enthalpy of sublimation (ΔfHsublim)	71.06 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H310, H315, H319, H330, H335
Precautionary statements	P260, P262, P264, P270, P271, P280, P284, P301+P312, P302+P350, P302+P352, P304+P340, P305+P351+P338, P310, P312, P320, P321, P330, P332+P313, P337+P313, P361, P362, P363, P403+P233, P405, P501 Preview warning: Omit Rules: keep P320, omit P322 Preview warning: Omit Rules: keep P260, omit P261
Flash point	122 °C (252 °F; 395 K)
Related compounds
Related compounds	acenaphthene
	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

Acenaphthylene, a polycyclic aromatic hydrocarbon is an ortho- and peri-fused tricyclic hydrocarbon. The molecule resembles naphthalene with positions 1 and 8 connected by a -CH=CH- unit. It is a yellow solid. Unlike many polycyclic aromatic hydrocarbons, it has no fluorescence.