The shipping name UN2067, AMMONIUM NITRATE BASED FERTILIZER, must not be used for mixtures containing ammonium nitrate as the main constituent unless the mixtures are within the following limits:
at least 90 % ammonium nitrate with 0.2 % or less of total combustible or organic material calculated as carbon and with material, if any, that is inorganic and inert towards ammonium nitrate;
less than 90 % but more than 70 % ammonium nitrate with other inorganic materials, or more than 80 % but less than 90 % ammonium nitrate mixed with calcium carbonate, dolomite or mineral calcium sulphate and not more than 0.4 % total combustible or organic material calculated as carbon; or
nitrogen-type ammonium nitrate based fertilizers containing mixtures of ammonium nitrate and ammonium sulphate with more than 45 % but less than 70 % ammonium nitrate and not more than 0.4 % total combustible or organic material calculated as carbon such that the sum of the percentage compositions of ammonium nitrate and ammonium sulphate exceeds 70 %.