{
  "url": "https://openlegislation.uk/eu-regulation-2011-544/annex/part-A/division-2/division-2.9/division-2.9.4",
  "json_url": "https://openlegislation.uk/eu-regulation-2011-544/annex/part-A/division-2/division-2.9/division-2.9.4.json",
  "legislation": "eur/2011/544",
  "legislation_title": "Commission Regulation (EU) No 544/2011 of 10 June 2011 implementing Regulation (EC) No 1107/2009 of the European Parliament and of the Council as regards the data requirements for active substances (Text with EEA relevance) (repealed)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2011-544",
  "path": "annex/part/A/division/2/division/2.9/division/2.9.4",
  "kind": "division",
  "number": "2.9.4",
  "heading": null,
  "text": "Where dissociation in water occurs, the dissociation constant(s) (pKa values) of the purified active substance must be determined and reported in accordance with OECD Test Guideline 112. The identity of the dissociated species formed, based on theoretical considerations, must be reported. If the active substance is a salt, the pKa value of the active principle must be given.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Repealed (subject to transitional measures in Arts. 3, 4) by Commission Regulation (EU) No 283/2013 of 1 March 2013 setting out the data requirements for active substances, in accordance with Regulation (EC) No 1107/2009 of the European Parliament and of the Council concerning the placing of plant protection products on the market Text with EEA relevance."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2011/544/annex/part/A/division/2/division/2.9/division/2.9.4",
    "retrieved_at": "2026-11-01T14:50:06.051752+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."
}