{
  "url": "https://openlegislation.uk/eu-regulation-2008-1272/annex-I/division-2/division-2.3/division-2.3.4/division-2.3.4.1",
  "json_url": "https://openlegislation.uk/eu-regulation-2008-1272/annex-I/division-2/division-2.3/division-2.3.4/division-2.3.4.1.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/2/division/2.3/division/2.3.4/division/2.3.4.1",
  "kind": "division",
  "number": "2.3.4.1",
  "heading": "The chemical heat of combustion (ΔΗ c ), in kilojoules per gram (kJ/g), is the product of the theoretical heat of combustion (ΔΗ comb ), and a combustion efficiency, usually less than 1,0 (a typical combustion efficiency is 0,95 or 95 %).",
  "text": "For a composite aerosol formulation, the chemical heat of combustion is the summation of the weighted heats of combustion for the individual components, as follows:\nΔH c product = ∑ i n w i % × ΔH c i\nwhere:\nΔΗ c chemical heat of combustion (kJ/g);\nw i % mass fraction of component i in the product;\nΔΗ c(i) specific heat of combustion (kJ/g)of component i in the product.\nThe chemical heats of combustion can be found in the literature, calculated or determined by tests (see ASTM D 240 as amended — Standard Test Methods for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter, EN/ISO 13943 as amended, 86.l to 86.3 — Fire safety — Vocabulary, and NFPA 30B as amended — Code for the Manufacture and Storage of Aerosol Products).",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Regulation (EU) No 487/2013 of 8 May 2013 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/2/division/2.3/division/2.3.4/division/2.3.4.1",
    "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."
}