{
  "url": "https://openlegislation.uk/eu-regulation-2008-1272/annex-I/division-4/division-4.1/division-4.1.2/division-4.1.2.6",
  "json_url": "https://openlegislation.uk/eu-regulation-2008-1272/annex-I/division-4/division-4.1/division-4.1.2/division-4.1.2.6.json",
  "legislation": "eur/2008/1272",
  "legislation_title": "Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006 (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2008-1272",
  "path": "annex/I/division/4/division/4.1/division/4.1.2/division/4.1.2.6",
  "kind": "division",
  "number": "4.1.2.6",
  "heading": null,
  "text": "The criteria for classifying and categorising substances as ‘ hazardous to the aquatic environment ’ are summarised in Table 4.1.0.\nTable 4.1.0\nClassification categories for substances hazardous to the aquatic environment\n(a) Short-term (acute) aquatic hazard\nCategory Acute 1:\n(Note 1)\n96 hr LC 50 (for fish)\n≤ 1 mg/l and/or\n48 hr EC 50 (for crustacea)\n≤ 1 mg/l and/or\n72 or 96 hr ErC 50 (for algae or other aquatic plants)\n≤ 1 mg/l.\n(Note 2)\n(b) Long-term (chronic) aquatic hazard\n(i) Non-rapidly degradable substances (Note 3) for which there are adequate chronic toxicity data available\nCategory Chronic 1:\n(Note 1)\nChronic NOEC or EC x (for fish)\n≤ 0,1 mg/l and/or\nChronic NOEC or EC x (for crustacea)\n≤ 0,1 mg/l and/or\nChronic NOEC or EC x (for algae or other aquatic plants)\n≤ 0,1 mg/l.\nCategory Chronic 2:\nChronic NOEC or EC x (for fish)\n≤ 1 mg/l and/or\nChronic NOEC or EC x (for crustacea)\n≤ 1 mg/l and/or\nChronic NOEC or EC x (for algae or other aquatic plants)\n≤ 1 mg/l.\n(ii) Rapidly degradable substances (Note 3) for which there are adequate chronic toxicity data available\nCategory Chronic 1:\n(Note 1)\nChronic NOEC or EC x (for fish)\n≤ 0,01 mg/l and/or\nChronic NOEC or EC x (for crustacea)\n≤ 0,01 mg/l and/or\nChronic NOEC or EC x (for algae or other aquatic plants)\n≤ 0,01 mg/l.\nCategory Chronic 2:\nChronic NOEC or EC x (for fish)\n≤ 0,1 mg/l and/or\nChronic NOEC or EC x (for crustacea)\n≤ 0,1 mg/l and/or\nChronic NOEC or EC x (for algae or other aquatic plants)\n≤ 0,1 mg/l.\nCategory Chronic 3:\nChronic NOEC or EC x (for fish)\n≤ 1 mg/l and/or\nChronic NOEC or EC x (for crustacea)\n≤ 1 mg/l and/or\nChronic NOEC or EC x (for algae or other aquatic plants)\n≤ 1 mg/l.\n(iii) Substances for which adequate chronic toxicity data are not available\nCategory Chronic 1:\n(Note 1)\n96 hr LC 50 (for fish)\n≤ 1 mg/l and/or\n48 hr EC 50 (for crustacea)\n≤ 1 mg/l and/or\n72 or 96 hr ErC 50 (for algae or other aquatic plants)\n≤ 1 mg/l.\n(Note 2)\nand the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500\n(or, if absent, the log K ow ≥ 4).\n(Note 3).\nCategory Chronic 2:\n96 hr LC 50 (for fish)\n> 1 to ≤ 10 mg/l and/or\n48 hr EC 50 (for crustacea)\n> 1 to ≤ 10 mg/l and/or\n72 or 96 hr ErC 50 (for algae or other aquatic plants)\n> 1 to ≤ 10 mg/l.\n(Note 2)\nand the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500\n(or, if absent, the log K ow ≥ 4).\n(Note 3).\nCategory Chronic 3:\n96 hr LC 50 (for fish)\n> 10 to ≤ 100 mg/l and/or\n48 hr EC 50 (for crustacea)\n> 10 to ≤ 100 mg/l and/or\n72 or 96 hr ErC 50 (for algae or other aquatic plants)\n> 10 to ≤ 100 mg/l.\n(Note 2)\nand the substance is not rapidly degradable and/or the experimentally determined BCF ≥ 500\n(or, if absent, the log K ow ≥ 4).\n(Note 3).\n‘ Safety net ’ classification\nCategory Chronic 4\nCases when data do not allow classification under the above criteria but there are nevertheless some grounds for concern. This includes, for example, poorly soluble substances for which no acute toxicity is recorded at levels up to the water solubility (note 4), and which are not rapidly degradable in accordance with Section 4.1.2.9.5 and have an experimentally determined BCF ≥ 500 (or, if absent, a log Kow ≥ 4), indicating a potential to bioaccumulate, which will be classified in this category unless other scientific evidence exists showing classification to be unnecessary. Such evidence includes chronic toxicity NOECs > water solubility or > 1 mg/l, or other evidence of rapid degradation in the environment than the ones provided by any of the methods listed in Section 4.1.2.9.5.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Regulation (EU) No 286/2011 of 10 March 2011 amending, for the purposes of its adaptation to technical and scientific progress, Regulation (EC) No 1272/2008 of the European Parliament and of the Council on classification, labelling and packaging of substances and mixtures (Text with EEA relevance)."
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Substituted by Commission Regulation (EU) 2016/918 of 19 May 2016 amending, for the purposes of its adaptation to technical and scientific progress, Regulation (EC) No 1272/2008 of the European Parliament and of the Council on classification, labelling and packaging of substances and mixtures (Text with EEA relevance)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2008/1272/annex/I/division/4/division/4.1/division/4.1.2/division/4.1.2.6",
    "retrieved_at": "2026-11-01T14:51:47.470832+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."
}