{
  "url": "https://openlegislation.uk/aerosol-dispensers-regulations-2009/schedule-1A/paragraph-1.10",
  "json_url": "https://openlegislation.uk/aerosol-dispensers-regulations-2009/schedule-1A/paragraph-1.10.json",
  "legislation": "uksi/2009/2824",
  "legislation_title": "The Aerosol Dispensers Regulations 2009",
  "legislation_url": "https://openlegislation.uk/aerosol-dispensers-regulations-2009",
  "path": "schedule/1A/paragraph/1.10",
  "kind": "paragraph",
  "number": "1.10",
  "heading": "Chemical Heat of Combustion",
  "text": "The chemical heat of combustion ΔHc shall be either determined by:\n(a) acknowledged rules of technology, described e.g. in standards such as ASTM D 240, ISO 13943 86.1 to 86.3 and NFPA 30B, or found in the scientifically established literature; or\n(b) applying the following calculation method:\nThe chemical heat of combustion (ΔHc), in kilojoules per gram (kJ/g), can be calculated as the product of the theoretical heat of combustion (ΔHcomb), and a combustion efficiency, usually less than 1,0 (a typical combustion efficiency is 0,95 or 95%).\nFor a composite aerosol formulation, the chemical heat of combustion is the summation of the weighted heats of combustion for the individual components, as follows:\nwhere:\nΔHc = chemical heat of combustion (kJ/g) of the product;\nwi% = mass fraction of component i in the product;\nΔHc(i) = specific heat of combustion (kJ/g) of component i in the product.\nThe person responsible for the marketing of the aerosol dispenser has to describe the method used for determining the chemical heat of combustion in a document to be made readily available in English at the address specified on the label in accordance with regulation 3(8)(a)(i), if the chemical heat of combustion is used as a parameter for assessing the flammability of aerosols, according to the provisions of these Regulations.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Sch. 1A inserted (E.W.S.) (31.12.2020) by The Product Safety and Metrology etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/696), reg. 1, Sch. 13 para. 8 (with reg. 2 as amended by S.I. 2020/676, regs. 1(1), 2); 2020 c. 1, Sch. 5 para. 1(1)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2009/2824/schedule/1A/paragraph/1.10",
    "retrieved_at": "2026-10-29T03:03:51.158826+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."
}