# Poisons Act 1972, Part 1: Regulated explosives precursors

Extent: E+W+S

Name of substance and Chemical Abstracts Service Registry number (CAS RN)
Concentration limit (weight in weight)
Ammonium nitrate (CAS RN 6484-52-2) in concentration of 16% by weight of nitrogen in relation to ammonium nitrate or higher
-
Hexamine (CAS RN 100-97-0)
-
Hydrochloric acid (CAS RN 7647-01-0)
10% w/w
Hydrogen peroxide (CAS RN 7722-84-1)
12% w/w
Nitromethane (CAS RN 75-52-5)
30% w/w
Nitric acid (CAS RN 7697-37-2)
3% w/w
Phosphoric acid (CAS RN 7664-38-2)
30% w/w
Potassium chlorate (CAS RN 3811-04-9)
40% w/w
Potassium perchlorate (CAS RN 7778-74-7)
40% w/w
Sodium chlorate (CAS RN 7775-09-9)
40% w/w
Sodium perchlorate (CAS RN 7601-89-0)
40% w/w
Sulfuric acid (CAS RN 7664-93-9)
15% w/w

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Source: https://www.legislation.gov.uk/ukpga/1972/66/schedule/1A/part/1 (the official version)
Page: https://openlegislation.uk/poisons-act-1972/schedule-1A/part-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.