{
  "url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-amendment-regulations-1990/schedule",
  "json_url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-amendment-regulations-1990/schedule.json",
  "legislation": "uksi/1990/2026",
  "legislation_title": "The Control of Substances Hazardous to Health (Amendment) Regulations 1990",
  "legislation_url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-amendment-regulations-1990",
  "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 TO MAXIMUM EXPOSURE LIMITS\nRegulations 2(1), 7(4)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 TW A reference period)\nShort-term maximum exposure limit (10-minute reference period)\nSubstance\nFormula\nppm\nmg m−3\nppm\nmg m−3\nAcrylamide\nCH2=CHCONH2\n—\n0.3\n—\n—\nAcrylonitrile\nCH2=CHCN\n2\n4\n—\n—\nArsenic & compounds except arsine (as As)\nAs\n—\n0.1\n—\n—\nBenzene\nC6H7sub6;\n5\n15\n—\n—\nButa-1,3-diene\nCH2=CHCH=CH2\n10\n22\n—\n—\n2-Butoxyethanol\nCH4H9OCH2CH2OH\n25\n120\n—\n—\nCadmium & cadmium compounds, except cadmium oxide fume and cadmium sulphide pigments (as Cd)\nCd\n—\n0.05\n—\n—\nCadmium oxide fume (as Cd)\nCdO\n—\n0.05\n—\n0.05\nCadmium sulphide pigments (respirable dust as Cd)\nCdS\n—\n0.04\n—\n—\nCarbon disulphide\nCS2\n10\n30\n—\n—\n1,2-Dibromoethane (Ethyl dibromide)\nBrCG2CH2Br\n0.5\n4\n—\n—\nDichloromethane\nCH2Cl2\n100\n350\n—\n—\n2,2'-Dichloro-4,4'-methylene dianiline (MbOCA)\nCH2(C6H3ClNH2)2\n—\n0.005\n—\n—\n2-Ethoxyethanol\nC2H5OCH2CH2OH\n10\n37\n—\n—\n2-Ethoxyethyl acetate\nC2H5OCH2CH2OOCCH3\n10\n54\n—\n—\nEthylene oxide\nCH2CH2O\n5\n10\n—\n—\nFormaldehyde\nHCHO\n2\n2.5\n2\n2.5\nHydrogen cyanide\nHCN\n—\n—\n10\n10\nIsocyanates, all (as-NCO)\n—\n0.02\n—\n0.07\nMan-made mineral fibre\n—\n5\n—\n—\n2-Methoxyethanol\nCH3OCH2CH2OH\n5\n16\n—\n—\n2-Methoxyethyl acetate\nCH3COOCH2CH2OCH3\n5\n24\n—\n—\nRubber process dust\n—\n8\n—\n—\nRubber fume\n—\n0.6\n—\n—\nStyrene\nC6H5CH=CH2\n100\n420\n250\n1050\n1,1,1-Trichloroethane\nCH3CCl3\n350\n1900\n450\n2450\nTrichloroethylene\nCCl2=CHCl\n100\n535\n150\n802\nVinyl chloride\nCH2=CHCl\n7\n—\n—\n—\nVinylidene chloride\nCH2=CCl2\n10\n40\n—\n—\nWood dust (hard wood)\n—\n5\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 maximum exposure limit of 3 ppm"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1990/2026/schedule",
    "retrieved_at": "2026-10-29T14:59:10.913121+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."
}