The invention relates to a method for the production of IPDA comprising the steps of: V. converting IPN with ammonia and hydrogen to IPDA, VI. removing hydrogen and/or ammonia from the effluent from step I VII. separating the effluent from step II in one or more steps into (v) a fraction comprising an organic phase having a boiling point lower than IPDA (vi) a fraction comprising an aqueous phase having a boing point lower than IPDA; (vii) a fraction comprising IPDA (viii) a fraction comprising components having a boiling point higher than IPDA; and VIII. subjecting the fraction (ii) to one or more waste-water pretreatment steps, se-lected from the group consisting of evaporation, oxidation and adsorption.