# The Planning (Hazardous Substances) (No. 2) Regulations (Northern Ireland) 2015, Paragraph 19


Potassium nitrate (1,250/5,000)
This applies to those composite potassium-nitrate based fertilisers (in crystalline form) which have the same hazardous properties as pure potassium nitrate.

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Source: https://www.legislation.gov.uk/nisr/2015/344/schedule/2/paragraph/19 (the official version)
Page: https://openlegislation.uk/planning-hazardous-substances-no-2-regulations-northern-ireland-2015/schedule-2/paragraph-19
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.