# 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), Division 2.3.2.1: Aerosols shall be classified in one of the three categories of this hazard class, depending on their flammable properties and their heat of combustion. They shall be considered for classification in Category 1 or 2 if they contain more than 1 % components (by mass) which are classified as flammable according to the following criteria set out in this Part:

Extent: E+W+S+N.I.

Flammable gases (see Section 2.2);
Liquids with a flash point ≤ 93 °C, which includes Flammable Liquids according to Section 2.6;
Flammable solids (see Section 2.7);
or if their heat of combustion is at least 20 kJ/g.

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Source: https://www.legislation.gov.uk/eur/2008/1272/annex/I/division/2/division/2.3/division/2.3.2/division/2.3.2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2008-1272/annex-I/division-2/division-2.3/division-2.3.2/division-2.3.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.