Φ<sub>ex</sub><noinclude>{{lowercase title}}
{{Infobox model parameter| name = kex| param = <onlyinclude>k<sub>ex</sub></onlyinclude>| desc = The fast chemical exchange factor, in rad2rate constant.| equation = 1/{{:tex}}| units = rad.s<sup>-2. This is equal to:1</sup>}}
{{:Phiex}} = pApBΔω2 </noinclude> [[Category:Relaxation dispersionanalysis]]
[[Category:Relaxation dispersion parameters]]