The problems associated with η-X mixing and η→3 π in a chiral lagrangian framework, assuming a basic (3, 3 )+(3, 3 ) symmetry breaking of SU(3) × SU(3) and that ΔI = 1 electromagnetic processes are dominantly described by an effective u 3 type interaction, are reviewed. The X is introduced through a chiral singlet field in a general fashion into the lagrangian. A relation is found between the processes η→3 π, X→ ηππ and X→3 π and if the width of the X approaches the present experimental limit there could be significant enhancement in η→3 π so that the calculated rate agrees with experiment. The introduction of a singlet axial current so that the basic symmetry is U(3) × U(3) is discussed, but is shown to be invalid in the chiral lagrangian framework with first-order symmetry breaking. The scale of the u 3 interaction is compared with baryon electromagnetic mass differences. The implied isospin violation in πN scattering length is calculated, and is found to be very small.