Pentafluorobenzene

Pentafluorobenzene

Names
Preferred IUPAC name Pentafluorobenzene
Other names Pentafluorobenzene, phenyl pentafluoride
Identifiers
CAS Number	363-72-4 Y
3D model (JSmol)	Interactive image
ChemSpider	13866746
ECHA InfoCard	100.006.054
EC Number	206-658-7
PubChem CID	9696
UNII	IH36LU53XS Y
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.^[1] The compound consists of a benzene ring substituted with five fluorine atoms.^[2] The substance is a colorless liquid with a boiling point similar to that of benzene.^[3][4]

It is prepared by defluorination of highly fluorinated cyclohexanes over hot nickel or iron.^[5] Another method involved dehydrofluorination of polyfluorinated cyclohexane using hot aqueous solution of potassium hydroxide.^[6]

It has been observed as a degradation by-product of the incineration of polytetrafluoroethylene and of biosolids.^[7]