# 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 2.1.4.3: The acceptance procedure for the hazard class ‘explosives’ need not be applied if:

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

(a) There are no chemical groups associated with explosive properties present in the molecule. Examples of groups which may indicate explosive properties are given in Table A6.1 in Appendix 6 of the UN RTDG, Manual of Tests and Criteria; or
(b) The substance contains chemical groups associated with explosive properties which include oxygen and the calculated oxygen balance is less than - 200;
The oxygen balance is calculated for the chemical reaction:
CxHyOz+ [x+ (y/4)-(z/2)] O2 → x CO2 + (y/2) H2O
Using the formula:
Oxygen balance = -1 600 [2x + (y/2)-z]/molecular weight;
(c) For an organic substance, or a homogenous mixture of organic substances, containing a chemical group (or groups) associated with explosive properties:
the exothermic decomposition energy is less than 500 J/g, or
the onset of exothermic decomposition is 500 °C or above
as indicated in Table 2.1.3.
Table 2.1.3
Decision to apply the acceptance procedure for the hazard class ‘ Explosives ’ for an organic substance or a homogenous mixture of organic substances
Decomposition energy (J/g)
Decomposition onset temperature (°C)
Apply acceptance procedure? (Yes/No)
< 500
< 500
No
< 500
≥ 500
No
≥ 500
< 500
Yes
≥ 500
≥ 500
No
The exothermic decomposition energy may be determined using a suitable calorimetric technique (see section 20.3.3.3 of the UN RTDG, Manual of Tests and Criteria ).
(d) For mixtures of inorganic oxidising substances with organic material(s), the concentration of the inorganic oxidising substance is:
less than 15 % by mass, if the oxidising substance is assigned to Categories 1 or 2;
less than 30 % by mass, if the oxidising substance is assigned to Category 3.

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Source: https://www.legislation.gov.uk/eur/2008/1272/annex/I/division/2/division/2.1/division/2.1.4/division/2.1.4.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2008-1272/annex-I/division-2/division-2.1/division-2.1.4/division-2.1.4.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.