{
  "url": "https://openlegislation.uk/poisons-act-1972/schedule-1A/part-1",
  "json_url": "https://openlegislation.uk/poisons-act-1972/schedule-1A/part-1.json",
  "legislation": "ukpga/1972/66",
  "legislation_title": "Poisons Act 1972",
  "legislation_url": "https://openlegislation.uk/poisons-act-1972",
  "path": "schedule/1A/part/1",
  "kind": "part",
  "number": "1",
  "heading": "Regulated explosives precursors",
  "text": "Name of substance and Chemical Abstracts Service Registry number (CAS RN)\nConcentration limit (weight in weight)\nAmmonium nitrate (CAS RN 6484-52-2) in concentration of 16% by weight of nitrogen in relation to ammonium nitrate or higher\n-\nHexamine (CAS RN 100-97-0)\n-\nHydrochloric acid (CAS RN 7647-01-0)\n10% w/w\nHydrogen peroxide (CAS RN 7722-84-1)\n12% w/w\nNitromethane (CAS RN 75-52-5)\n30% w/w\nNitric acid (CAS RN 7697-37-2)\n3% w/w\nPhosphoric acid (CAS RN 7664-38-2)\n30% w/w\nPotassium chlorate (CAS RN 3811-04-9)\n40% w/w\nPotassium perchlorate (CAS RN 7778-74-7)\n40% w/w\nSodium chlorate (CAS RN 7775-09-9)\n40% w/w\nSodium perchlorate (CAS RN 7601-89-0)\n40% w/w\nSulfuric acid (CAS RN 7664-93-9)\n15% w/w",
  "extent": "E+W+S",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "S. 7 substituted (26.3.2015 for specified purposes, 20.4.2015 for specified purposes, 26.5.2015 in force in so far as not already in force) by Deregulation Act 2015 (c. 20), s. 115(2)(e), Sch. 21 para. 8; S.I. 2015/994, art. 5; S.I. 2015/994, art. 6(p)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Sch. 1A inserted (26.3.2015 for specified purposes, 20.4.2015 for specified purposes, 26.5.2015 in force in so far as not already in force) by Deregulation Act 2015 (c. 20), s. 115(2)(e), Sch. 21 para. 16; S.I. 2015/994, art. 5; S.I. 2015/994, art. 6(p)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Words in Sch. 1A Pt. 1 inserted (1.10.2023) by S.I. 2023/63, reg. 8(2)(a) (as substituted by The Control of Explosives Precursors and Poisons (Amendment) Regulations 2023 (S.I. 2023/810), regs. 1(1), 2)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Words in Sch. 1A Pt. 1 inserted (1.10.2023) by S.I. 2023/63, reg. 8(2)(b) (as substituted by The Control of Explosives Precursors and Poisons (Amendment) Regulations 2023 (S.I. 2023/810), regs. 1(1), 2)"
    },
    {
      "type": "F",
      "label": "F5",
      "text": "Words in Sch. 1A Pt. 1 inserted (1.5.2018 for specified purposes, 1.7.2018 for specified purposes, 1.11.2018 in so far as not already in force) by The Poisons Act 1972 (Explosives Precursors) (Amendment) Regulations 2018 (S.I. 2018/451), reg. 2(1)(a)"
    },
    {
      "type": "F",
      "label": "F6",
      "text": "Words in Sch. 1A Pt. 1 inserted (1.5.2018 for specified purposes, 1.7.2018 for specified purposes, 1.11.2018 in so far as not already in force) by The Poisons Act 1972 (Explosives Precursors) (Amendment) Regulations 2018 (S.I. 2018/451), reg. 2(1)(b)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/1972/66/schedule/1A/part/1",
    "retrieved_at": "2026-10-29T10:48:30.792921+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}