Perfluorobutane (PFB) is an inert, high-density colorless gas. It is a simple fluorocarbon with a n-butane skeleton and all the hydrogen atoms replaced with fluorine atoms.

Quick Facts Names, Identifiers ...

Perfluorobutane

Names
Preferred IUPAC name Decafluorobutane[1]
Other names Perflubutane (USAN) DFB Halocarbon 610 R610
Identifiers
CAS Number	355-25-9 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:134964
ChemSpider	13862701 N
ECHA InfoCard	100.005.983
EC Number	206-580-3
KEGG	D05440 Y
PubChem CID	9638
UNII	SE4TWR0K2C Y
CompTox Dashboard (EPA)	DTXSID5059876
InChI InChI=1S/C4F10/c5-1(6,3(9,10)11)2(7,8)4(12,13)14 N Key: KAVGMUDTWQVPDF-UHFFFAOYSA-N N InChI=1/C4F10/c5-1(6,3(9,10)11)2(7,8)4(12,13)14 Key: KAVGMUDTWQVPDF-UHFFFAOYAC
SMILES C(C(C(F)(F)F)(F)F)(C(F)(F)F)(F)F
Properties
Chemical formula	C4F10
Molar mass	238.028 g·mol−1
Appearance	Colorless gas
Density	11.21 kg/m3 (gas, 101.3 kPa at boiling point)[2] 1594 kg/m3 (liquid, 101.3 kPa at boiling point)[2] [dead link]
Melting point	−128 °C (−198 °F; 145 K)[3]
Boiling point	−1.7 °C (28.9 °F; 271.4 K)[2]
Solubility in water	1.5 mg/L (101.3 kPa)[3]
log P	> 3.93 (n-octanol/water)[3]
Vapor pressure	330.3 kPa (at 25 °C)[3]
Viscosity	0.0001218 Poise[2]
Hazards
Safety data sheet (SDS)	MSDS at Linde Gas
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

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Perfluorobutane can replace Halon 1301 in fire extinguishers,^[4] as well as the gas component for newer generation microbubble ultrasound contrast agents. Sonazoid^[5] is one such microbubble formulation developed by Amersham Health that uses perfluorobutane for the gas core.

Inhaling perfluorobutane makes one's voice deeper.

If perfluorobutane is released to the environment, it will not be broken down in air. It is not expected to be broken down by sunlight. It will move into air from soil and water surfaces. If it is exposed to conditions of extreme heat from misuse, equipment failure, etc., toxic decomposition products including hydrogen fluoride can be produced.^[6]

Perfluorobutane has an estimated lifetime greater than 2600 years. Perfluorobutane has a high global warming potential value of 4800.^[7] Its ozone depletion potential is zero.^{[citation needed]}