  In this study, we analyze the vacuum stability of the economical 331 model at
the one-loop level using the renormalization group equations and a single-scale
renormalization method. By integrating these equations, we determine stability
conditions up to the Planck scale, incorporating constraints from recent
experimental data on new Higgs-like bosons, charged scalars, and charged and
neutral gauge bosons. Our analysis uncovers intriguing relations between the
mass of the heaviest scalar and the masses of exotic quarks, in order to ensure
stability of the model up to the Planck scale. For the 331 energy scale used in
this work, $18$ TeV, we find an upper bound on the heaviest quark mass of the
model, which is not so distant from future LHC runs, serving as bounds to be
searched. Additionally, we explore relations between the scalar couplings
coming stability and perturbativity conditions. These impose unprecedented
constraints on the economical 331 model.
