{
  "url": "https://openlegislation.uk/chemicals-hazard-information-and-packaging-regulations-1993/schedule-4/part-II/paragraph-4",
  "json_url": "https://openlegislation.uk/chemicals-hazard-information-and-packaging-regulations-1993/schedule-4/part-II/paragraph-4.json",
  "legislation": "uksi/1993/1746",
  "legislation_title": "The Chemicals (Hazard Information and Packaging) Regulations 1993",
  "legislation_url": "https://openlegislation.uk/chemicals-hazard-information-and-packaging-regulations-1993",
  "path": "schedule/4/part/II/paragraph/4",
  "kind": "paragraph",
  "number": "4",
  "heading": "CORROSIVE AND IRRITANT EFFECTS",
  "text": "Solid and liquid preparations\n(1) —For substances that produce corrosive effects (R34, R35) or irritant effects (R36, R37, R38, R41), the individual concentration limits specified in Table IV determine, when appropriate, the classification of solid and liquid preparations.\nTABLE IV\nClassification of the substance and/or relevant standard risk phrase\nClassification of the preparation and standard risk phrase\nat least C with R35\nat least C with R34\nat least Xi with R41\nat least Xi with R36, R37, R38\nat least C with R35\nconc. ≥ 10% R35 obligatory\n5% ≤ conc. < 10% R34 obligatory\n1% ≤ conc. < 5% R36, R38 obligatory\nat least C with R34\nconc. ≥ 10% R34 obligatory\n5% ≤ conc. < 10% R36, R38 obligatory\nat least Xi with R41\nconc. ≥ 10% R41 obligatory\n5% ≤ conc. < 10% R36 obligatory\nat least Xi with R36, R37, R38\nconc. ≥ 20% R36, R37 and R38 are obligatory in light of the concentration present if they apply to the substances under consideration\nGaseous Preparations\n(2) —For gases that produce corrosive effects (R34, R35) or irritant effects (R37, R41), the individual concentration limits specified in Table IVA below, expressed as a volume/volume percentage determine, when appropriate, the classification of gaseous preparations and shall determine which particular risk phrases are to be assigned to them.\nTABLE IVA\nClassification of the substance (gas) and/or relevant standard risk phrase\nClassification of the gaseous preparation and standard risk phrase\nat least C with R35\nat least C with R34\nat least Xi with R41\nat least Xi with R36, R37 or R38\nat least C with R35\nconc. ≥ 1% R35 obligatory\n0.2% ≤ conc. < 1% R34 obligatory\n0.02% ≤ conc. < 0.2% R37 obligatory\nat least C with R34\nconc. ≥ 5% R34 obligatory\n0.5% ≤ conc. < 5% R37 obligatory\nat least Xi with R41\nconc. ≥ 5% R41 obligatory\n0.5% ≤ conc. < 5% R36 obligatory\nat least Xi with R36, R37, R38\nconc. ≥ &5percnt; R37, R36, R38 obligatory as appropriate",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1993/1746/schedule/4/part/II/paragraph/4",
    "retrieved_at": "2026-10-29T13:53:58.417577+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."
}