# 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 2.5.2.1: Gases under pressure shall be classified, according to their physical state when packaged, in one of four groups in accordance with Table 2.5.1:

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

Table 2.5.1
Criteria for gases under pressure
Note:
Aerosols shall not be classified as gases under pressure. See section 2.3.
Group
Criteria
Compressed gas
A gas which when packaged under pressure is entirely gaseous at – 50 °C; including all gases with a critical temperature ≤ – 50 °C.
Liquefied gas
A gas which, when packaged under pressure, is partially liquid at temperatures above – 50 °C. A distinction is made between:
(i) high pressure liquefied gas: a gas with a critical temperature between – 50 °C and + 65 °C; and
(ii) low pressure liquefied gas: a gas with a critical temperature above + 65 °C.
Refrigerated liquefied gas
A gas which when packaged is made partially liquid because of its low temperature.
Dissolved gas
A gas which when packaged under pressure is dissolved in a liquid phase solvent.

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Source: https://www.legislation.gov.uk/eur/2008/1272/annex/I/division/2/division/2.5/division/2.5.2/division/2.5.2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2008-1272/annex-I/division-2/division-2.5/division-2.5.2/division-2.5.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.