# 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 2.15.2.2: Organic peroxides shall be classified in one of the seven categories of ‘Types A to G’ for this class, according to the following principles:

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

(a) any organic peroxide which, as packaged, can detonate or deflagrate rapidly shall be defined as organic peroxide TYPE A;
(b) any organic peroxide possessing explosive properties and which, as packaged, neither detonates nor deflagrates rapidly, but is liable to undergo a thermal explosion in that package shall be defined as organic peroxide TYPE B;
(c) any organic peroxide possessing explosive properties when the substance or mixture as packaged cannot detonate or deflagrate rapidly or undergo a thermal explosion shall be defined as organic peroxide TYPE C;
(d) any organic peroxide which in laboratory testing:
(i) detonates partially, does not deflagrate rapidly and shows no violent effect when heated under confinement; or
(ii) does not detonate at all, deflagrates slowly and shows no violent effect when heated under confinement; or
(iii) does not detonate or deflagrate at all and shows a medium effect when heated under confinement;
shall be defined as organic peroxide TYPE D;
(e) any organic peroxide which, in laboratory testing, neither detonates nor deflagrates at all and shows low or no effect when heated under confinement shall be defined as organic peroxide TYPE E;
(f) any organic peroxide which, in laboratory testing, neither detonates in the cavitated state nor deflagrates at all and shows only a low or no effect when heated under confinement as well as low or no explosive power shall be defined as organic peroxide TYPE F;
(g) any organic peroxide which, in laboratory testing, neither detonates in the cavitated state nor deflagrates at all and shows no effect when heated under confinement nor any explosive power, provided that it is thermally stable, i.e. the SADT is 60 oC or higher for a 50 kg package, and, for liquid mixtures, a diluent having a boiling point of not less than 150 oC is used for desensitisation, shall be defined as organic peroxide TYPE G. If the organic peroxide is not thermally stable or a diluent having a boiling point less than 150 oC is used for desensitisation, the organic peroxide shall be defined as organic peroxide TYPE F.
Where the test is conducted in the package form and the packaging is changed, a further test shall be conducted where it is considered that the change in packaging will affect the outcome of the test.

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Source: https://www.legislation.gov.uk/eur/2008/1272/annex/I/division/2/division/2.15/division/2.15.2/division/2.15.2.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2008-1272/annex-I/division-2/division-2.15/division-2.15.2/division-2.15.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.