# The Control of Major Accident Hazards Regulations 2015, Paragraph 13


Ammonium nitrate (5,000/10,000): fertilisers capable of self-sustaining decomposition.
This applies to ammonium nitrate based compound/composite fertilisers (compound/composite fertilisers contain ammonium nitrate with phosphate and/or potash) which are capable of self-sustaining decomposition according to the UN Trough Test (the UN Manual of Tests and Criteria, Part III, subsection 38.2), and in which the nitrogen content as a result of ammonium nitrate is—
(a) between 15.75% and 24.5% by weight, and either with not more than 0.4% total combustible/organic materials or which fulfil the requirements of Annex III-2 to Regulation (EC) No. 2003/2003 of the European Parliament and of the Council of 13 October 2003 relating to fertilisers (“Regulation (EC) No. 2003/2003”) ; or
(b) equal to or less than 15.75% by weight and unrestricted combustible materials.

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Source: https://www.legislation.gov.uk/uksi/2015/483/schedule/1/paragraph/13 (the official version)
Page: https://openlegislation.uk/control-of-major-accident-hazards-regulations-2015/schedule-1/paragraph-13
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.