We consider bosonized QCD(2), and prove that after one rewrites the th
eory in terms of gauge-invariant fields, there exists an integrability
condition that is valid for the quantum theory as well. Furthermore,
performing a duality type transformation we obtain an appropriate acti
on for the description of the strong coupling limit, which is still in
tegrable. We also prove that the model displays a complicated set of c
onstraints, which restrict the dynamics of part of the theory, but whi
ch are necessary for maintaining the positive metric Hilbert space.