Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 31 FERTILIZERS 31 02 MINERAL OR CHEMICAL FERTILIZERS, NITROGENOUS. 31 02 29 OTHER DOUBLE SALTS & MIXTURES OF AMMONIUM SULPHATE & AMMONIUM NITRATE Commodity Code Description 31 02 29 00 OTHER DOUBLE SALTS & MIXTURES OF AMMONIUM SULPHATE & AMMONIUM NITRATE