{
  "url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-amendment-regulations-1996/schedule",
  "json_url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-amendment-regulations-1996/schedule.json",
  "legislation": "uksi/1996/3138",
  "legislation_title": "The Control of Substances Hazardous to Health (Amendment) Regulations 1996",
  "legislation_url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-amendment-regulations-1996",
  "path": "schedule",
  "kind": "schedule",
  "number": "THE",
  "heading": "SCHEDULE TO BE SUBSTITUTED AS SCHEDULE 1 TO THE PRINCIPAL REGULATIONS",
  "text": "“SCHEDULE 1\nLIST OF SUBSTANCES ASSIGNED MAXIMUMEXPOSURE LIMITS\nRegulations 2(1), 7(6) and 12(2)\nThe maximum exposure limits of the dusts included in the list below refer to the total inhalable dust fraction, unless otherwise stated.\nReference periods\nLong-term maximum exposure limit(8-hour TWA reference period)\nShort-term maximum exposure limit(15-minute reference period)\nSubstance\nFormula\nppm\nmg m−3\nppm\nmg m−3\n* In addition to the maximum exposure limit specified above man-made mineral fibre is also subject to a maximum exposure limit of 2 fibres ml-1 8-hour TWA, when measured or calculated by a method approved by the Health and Safety Commission.\n** Limit relates to cyclohexane soluble material.\n*** In addition to the maximum exposure limit specified above vinyl chloride is also subject to an overriding annual exposure limit of 3 ppm.\nAcrylamide\nCH2=CHCONH2\n—\n0.3\n—\n—\nAcrylonitrile\nCH2=CHCN\n2\n4.4\n—\n—\nAntimony & antimony compounds except stibine (as Sb)\nSb\n—\n0.5\n—\n—\nArsenic & compounds except arsine (as As)\nAs\n—\n0.1\n—\n—\nAzodicarbonamide\nC2H4N4O2\n—\n1.0\n—\n3.0\nBenzene\nC6H6\n5\n16\n—\n—\nBeryllium and beryllium compounds (as Be)\nBe\n—\n0.002\n—\n—\nBis(chloromethyl) ether\nClCH2OCH2C1\n0.001\n0.005\n—\n—\nButa-1, 3-diene\nCH2=CHCH=CH2\n10\n22\n—\n—\nCadmium & cadmium compounds, exceptcadmium oxide fume,cadmium sulphide andcadmium sulphidepigments (as Cd)\nCd\n—\n0.025\n—\n—\nCadmium oxide fume(as Cd)\nCdO\n—\n0.025\n—\n0.05\nCadmium sulphide andcadmium sulphidepigments (respirabledust as Cd)\nCdS\n—\n0.03\n—\n—\nCarbon disulphide\nCS2\n10\n32\n—\n—\n1-Chloro-2,3-epoxypropane (Epichlorohydrin)\nOCH2-CH-CH2Cl\n0.5\n1.9\n1.5\n5.8\nChromium (VI) compounds (as Cr)\nCr\n—\n0.05\n—\n—\nCobalt and cobalt compounds (as Co)\nCo\n–\n0.1\n—\n—\nCotton dust\n—\n2.5\n—\n—\n1,2-Dibromoethane (Ethylene dibromide)\nBrCH2CH2Br\n0.5\n3.9\n—\n—\n1,2-Dichloroethane (Ethylene dichloride)\nClCH2CH2Cl\n5\n21\n—\n—\nDichloromethane\nCH2Cl2\n100\n350\n300\n1060\n2,2'-Dichloro-4,4' -methylene dianiline (MbOCA)\nCH2(C6H3ClNH2)2\n—\n0.005\n—\n—\nDiethyl sulphate\nC4H10O4S\n0.05\n0.32\n—\n—\nDimethyl sulphate\nC2H6O4S\n0.05\n0.26\n—\n—\n2-Ethoxyethanol\nC2H5OCH2CH2OH\n10\n37\n—\n—\n2-Ethoxyethyl acetate\nC2H5OCH2CH2OOCCH3\n10\n55\n—\n—\nEthylene oxide\nCH2CH2O\n5\n9.2\n—\n—\nFerrous foundry particulate total inhalable dust\n—\n10\n—\n—\nrespirable dust\n—\n4\n—\n—\nFormaldehyde\nHCHO\n2\n2.5\n2\n2.5\nGrain dust\n—\n10\n—\n—\nHalogeno-platinum compounds (complex co-ordination compounds in which the platinum atom is directly co-ordinated to halide groups) (as Pt)\n—\n0.002\n—\n—\nHardwood dust\n—\n5\n—\n—\nHydrazine\nN2H4\n0.02\n0.03\n0.1\n0.13\nHydrogen cyanide\nHCN\n—\n—\n10\n11\nIodomethane\nCH3I\n2\n12\n—\n—\nIsocyanates, all (as -NCO)\n—\n0.02\n—\n0.07\nMaleic anhydride\nC4H2O3\n—\n1\n—\n3\nMan-made mineral fibre\n—\n5\n—\n—\n2-Methoxyethanol\nCH3OCH2CH2OH\n5\n16\n—\n—\n2-Methoxyethyl acetate\nCH3COOCH2CH2OCH3\n5\n25\n—\n—\n4,4'-Methylenedianiline\nCH2(C6H4NH2)2\n0.01\n0.08\n—\n—\nNickel and its inorganic compounds (except nickel carbonyl):\nNi\nwater-soluble nickel compounds (as Ni)\n—\n0.1\n—\n—\nnickel and water-insoluble nickel compounds (as Ni)\n—\n0.5\n—\n—\n2-Nitropropane\nCH3CH(NO2)CH3\n5\n19\n—\n—\nPhthalic anhydride\nC8H4O3\n—\n4\n—\n12\nPolychlorinated biphenyls (PCB)\nC12CH(10−×)Cl×\n—\n0.1\n—\n—\nPropylene oxide\nC3H6O\n5\n12\n—\n—\nRubber fume\n—\n0.6\n—\n—\nRubber process dust\n—\n6\n—\n—\nSilica, respirable crystalline\nSiO2\n—\n0.3\n—\n—\nSoftwood dust\n—\n5\n—\n—\nStyrene\nC6H5CH=CH2\n100\n430\n250\n1080\no-Toluidine\nCH3C6H4NH2\n0.2\n0.89\n—\n—\nTrichloroethylene\nCCl2=CHCl\n100\n550\n150\n820\nTriglycidyl isocyanurate (TGIC)\nC12H15N3O6\n—\n0.1\n—\n—\nTrimellitic anhydride\nC9H4O5\n—\n0.04\n—\n0.12\nVinyl chloride\nCH2=CHCI\n7\n—\n—\n—\nVinylidene chloride\nCH2=CCl2\n10\n40\n—\n—\nWool process dust\n—\n10\n—\n—\n”",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "* In addition to the maximum exposure limit specified above man-made mineral fibre is also subject to a maximum exposure limit of 2 fibres ml-1 8-hour TWA, when measured or calculated by a method approved by the Health and Safety Commission."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "** Limit relates to cyclohexane soluble material."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "*** In addition to the maximum exposure limit specified above vinyl chloride is also subject to an overriding annual exposure limit of 3 ppm."
    }
  ],
  "outstanding_effects": [
    {
      "type": "amended",
      "affecting": "uksi/1997/11",
      "affecting_title": "The Control of Substances Hazardous to Health (Amendment) Regulations 1997"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1996/3138/schedule",
    "retrieved_at": "2026-10-29T12:29:42.672627+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."
}