Section 06 Products of the chemical or allied industries 31 Fertilisers 31 02 Mineral or chemical fertilisers, nitrogenous. 31 02 80 Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution 31 02 80 00 Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution Commodity Code Description 31 02 80 00 000 Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution