{
  "url": "https://openlegislation.uk/eu-directive-2008-50/annex-X/division-B",
  "json_url": "https://openlegislation.uk/eu-directive-2008-50/annex-X/division-B.json",
  "legislation": "eudr/2008/50",
  "legislation_title": "Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe",
  "legislation_url": "https://openlegislation.uk/eu-directive-2008-50",
  "path": "annex/X/division/B",
  "kind": "division",
  "number": "B",
  "heading": "Substances",
  "text": "Measurement of ozone precursor substances shall include at least nitrogen oxides (NO and NO2), and appropriate volatile organic compounds (VOC). A list of volatile organic compounds recommended for measurement is given below:\n1-Butene\nIsoprene\nEthyl benzene\nEthane\nTrans-2-Butene\nn-Hexane\nm + p-Xylene\nEthylene\ncis-2-Butene\ni-Hexane\no-Xylene\nAcetylene\n1,3-Butadiene\nn-Heptane\n1,2,4-Trimethylebenzene\nPropane\nn-Pentane\nn-Octane\n1,2,3-Trimethylebenzene\nPropene\ni-Pentane\ni-Octane\n1,3,5-Trimethylebenzene\nn-Butane\n1-Pentene\nBenzene\nFormaldehyde\ni-Butane\n2-Pentene\nToluene\nTotal non-methane hydrocarbons",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudr/2008/50/annex/X/division/B",
    "retrieved_at": "2026-11-01T15:22:21.245568+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."
}