perfluorobutane perfluorobutane 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. perfluorobutane names preferred iupac name decafluorobutane other names perflubutane (usan)dfbhalocarbon 610r610 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 nkey: kavgmudtwqvpdf-uhfffaoysa-n ninchi=1/c4f10/c5-1(6,3(9,10)11)2(7,8)4(12,13)14key: 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)1594 kg/m3 (liquid, 101.3 kpa at boiling point) melting point −128 °c (−198 °f; 145 k) boiling point −1.7 °c (28.9 °f; 271.4 k) solubility in water 1.5 mg/l (101.3 kpa) log p > 3.93 (n-octanol/water) vapor pressure 330.3 kpa (at 25 °c) viscosity 0.0001218 poise 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 , 100 kpa). n verify (what is yn ?) infobox references uses perfluorobutane can replace halon 1301 in fire extinguishers, as well as the gas component for newer generation microbubble ultrasound contrast agents. sonazoid is one such microbubble formulation developed by amersham health that uses perfluorobutane for the gas core. inhaling perfluorobutane makes one's voice deeper. environmental impacts 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. perfluorobutane has an estimated lifetime greater than 2600 years. perfluorobutane has a high global warming potential value of 4800. its ozone depletion potential is zero.