Pentafluorobenzene

Pentafluorobenzene
Names
	Preferred IUPAC name Pentafluorobenzene
	Other names Pentafluorobenzene, phenyl pentafluoride
Identifiers
CAS Number	363-72-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	13866746;
ECHA InfoCard	100.006.054
EC Number	206-658-7;
PubChem CID	9696;
UNII	IH36LU53XS ;
CompTox Dashboard (EPA)	DTXSID8059893 ;
	InChI InChI=1S/C6HF5/c7-2-1-3(8)5(10)6(11)4(2)9/h1H Key: WACNXHCZHTVBJM-UHFFFAOYSA-N;
	SMILES C1=C(C(=C(C(=C1F)F)F)F)F;
Properties
Chemical formula	C6HF5
Molar mass	168.066 g·mol−1
Appearance	Colorless liquid
Density	1.511 g/cm3
Melting point	−47.4 °C (−53.3 °F; 225.8 K)
Boiling point	85 °C (185 °F; 358 K)
Solubility in water	Insoluble
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H225, H302, H315, H318, H335
Flash point	14 °C (57 °F; 287 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Pentafluorobenzene is a synthetic organofluoride compound with the molecular formula C
₆HF
₅. The compound consists of a benzene ring substituted with five fluorine atoms. The substance is a colorless liquid with a boiling point similar to that of benzene.

It is prepared by defluorination of highly fluorinated cyclohexanes over hot nickel or iron. Another method involved dehydrofluorination of polyfluorinated cyclohexane using hot aqueous solution of potassium hydroxide.

It has been observed as a degradation by-product of the incineration of polytetrafluoroethylene and of biosolids.