{
  "url": "https://openlegislation.uk/poisons-act-1972/schedule-1A/part-4",
  "json_url": "https://openlegislation.uk/poisons-act-1972/schedule-1A/part-4.json",
  "legislation": "ukpga/1972/66",
  "legislation_title": "Poisons Act 1972",
  "legislation_url": "https://openlegislation.uk/poisons-act-1972",
  "path": "schedule/1A/part/4",
  "kind": "part",
  "number": "4",
  "heading": "Reportable poisons",
  "text": "Note: for circumstances where requirements of this Act do not apply to a specified substance or mixture, see regulations made under section 9B.\nName of substance and Chemical Abstracts Service Registry number (CAS RN)\nConcentration limit (weight in weight or, where specified, total caustic alkalinity)\nAldicarb (CAS RN 116-06-3)\nAlpha-chloralose (CAS RN 15879-93-3)\nAmmonia (CAS RN 7664-41-7 and CAS RN 1336-21-6)\n10% w/w\n. . .\nBarium, salts of, the following—barium carbonate; barium silicofluoride\nCarbofuran (CAS RN 1563-66-2)\nCycloheximide (CAS RN 66-81-9)\nDinitrocresols (DNOC) (CAS RN 534-52-1); their compounds with a metal or a base\nDinoseb (CAS RN 88-85-7); its compounds with a metal or a base\nDinoterb (CAS RN 1420-07-1)\nDrazoxolon; its salts\nEndosulfan (CAS RN 115-29-7)\nEndothal (CAS RN 145-73-3); its salts\nEndrin (CAS RN 72-20-8)\nFentin (CAS RN 668-34-8), compounds of\nFormaldehyde (CAS RN 50-00-0)\n5% w/w\nFormic acid (CAS RN 64-18-6)\n25% w/w\n. . .\n. . .\nHydrofluoric acid (CAS RN 7664-39-3); alkali metal bifluorides; ammonium bifluoride (CAS RN 1341-49-7); alkali metal fluorides; ammonium fluoride (CAS RN 12125-01-8); sodium silicofluoride (CAS RN 16893-85-9)\n. . .\nMetallic oxalates\nMetal phosphides\n-\nMetal sulfides and polysulfides\n-\nMethomyl (CAS RN 16752-77-5)\nNicotine (CAS RN 54-11-5); its salts; its quaternary compounds\nNitrobenzene (CAS RN 98-95-3)\n0.1% w/w\nOxamyl (CAS RN 23135-22-0)\nParaquat (CAS RN 4685-14-7), salts of\nPhenols (as defined in Part 2 of this Schedule) in substances containing no more than 60%, weight in weight, of phenols; compounds of phenols with a metal in substances containing no more than the equivalent of 60%, weight in weight, of phenols\n. . .\nPhosphorus compounds, the following—azinphos-methyl, chlorfenvinphos, demephion, demeton-S-methyl, demeton-S-methyl sulphone, dialifos, dichlorvos, dioxathion, disulfoton, fonofos, mecarbam, mephosfolan, methidathion, mevinphos, omethoate, oxydemeton-methyl, parathion, phenkapton, phorate, phosphamidon, pirimiphos-ethyl, quinalphos, thiometon, thionazin, triazophos, vamidothion\nPotassium hydroxide (CAS RN 1310-58-3)\n17% of total caustic alkalinity\nSodium hydroxide (CAS RN 1310-73-2)\n12% of total caustic alkalinity\nSodium hypochlorite (CAS RN 7681-52-9) solutions above 6% available chlorine\n-\nSodium nitrite\nThiofanox (CAS RN 39196-18-4)\n. . .",
  "extent": null,
  "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. 4 omitted (1.10.2023) by S.I. 2023/63, reg. 8(5)(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. 4 inserted (1.10.2023) by S.I. 2023/63, reg. 8(5)(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. 4 inserted (1.10.2023) by S.I. 2023/63, reg. 8(5)(c) (as substituted by The Control of Explosives Precursors and Poisons (Amendment) Regulations 2023 (S.I. 2023/810), regs. 1(1), 2)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ukpga/1972/66/schedule/1A/part/4",
    "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."
}