To determine the content of ammonium nitrate in substances that are mixtures and that are transported under UN2067, AMMONIUM NITRATE BASED FERTILIZER, all nitrate ions for which a molecular equivalent of ammonium ions is present in the mixture must be calculated as a mass of ammonium nitrate.
The shipping name UN2071, AMMONIUM NITRATE BASED FERTILIZER, and the data in columns 3 to 9 of Schedule 1 must not be used for uniform ammonium nitrate based fertilizer mixtures of the nitrogen, phosphate or potash type unless the mixtures are within the following composition limits:
70 % or less of ammonium nitrate and 0.4 % or less of total combustible or organic material calculated as carbon; or
45 % or less of ammonium nitrate and unrestricted combustible material.
These Regulations, except for Part 1 (Coming into Force, Repeal, Interpretation, General Provisions and Special Cases) and Part 2 (Classification), do not apply to fertilizers within the composition limits if the fertilizers are shown not to be liable to self-sustaining decomposition by the Trough Test referred to subsection 38.2 of Part III of the Manual of Tests and Criteria.