2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/120623An empirical law for the rank-order behavior of journal impact factors is found. Using an extensive data base on impact factors including journals on Education, Agrosciences, Geosciences, Biosciences and Environ- mental, Chemical, Computer, Engineering, Material, Mathematical, Medical and Physical Sciences we have found extremely good fits out- performing other rank-order models. Some extensions to other areas of knowledge are discussed.Submitted to the Journal of Informetrics, redundat text cropped, bibliography corrected, new section added, typos correctedInformation RetrievalPhysics and Societytext