Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 31 FERTILIZERS 31 02 MINERAL OR CHEMICAL FERTILIZERS, NITROGENOUS. 31 02 40 MIXTURES OF AMMONIUM NITRATE WITH CALCIUM CARBONATE OR OTHER INORGANIC... Commodity Code Description 31 02 40 00 MIXTURES OF AMMONIUM NITRATE WITH CALCIUM CARBONATE OR OTHER INORGANIC...