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2.1.2.: Classification criteria

2.1.2.1. Substances, mixtures and articles of this class are classified as an unstable explosive on the basis of the flowchart in Figure 2.1.2. ►M4  The test methods are described in Part I of the UN RTDG, Manual of Tests and Criteria. ◄
2.1.2.2. Substances, mixtures and articles of this class, which are not classified as an unstable explosive, shall be assigned to one of the following six divisions depending on the type of hazard they present:
(a) Division 1.1 Substances, mixtures and articles which have a mass explosion hazard (a mass explosion is one which affects almost the entire quantity present virtually instantaneously);
(b) Division 1.2 Substances, mixtures and articles which have a projection hazard but not a mass explosion hazard;
(c) Division 1.3 Substances, mixtures and articles which have a fire hazard and either a minor blast hazard or a minor projection hazard or both, but not a mass explosion hazard:
(i) combustion of which gives rise to considerable radiant heat; or
(ii) which burn one after another, producing minor blast or projection effects or both;
(d) Division 1.4 Substances, mixtures and articles which present no significant hazard:
substances, mixtures and articles which present only a small hazard in the event of ignition or initiation. The effects are largely confined to the package and no projection of fragments of appreciable size or range is to be expected. An external fire shall not cause virtually instantaneous explosion of almost the entire contents of the package;
(e) Division 1.5 Very insensitive substances or mixtures which have a mass explosion hazard:
substances and mixtures which have a mass explosion hazard but are so insensitive that there is very little probability of initiation or of transition from burning to detonation under normal conditions;
(f) Division 1.6 Extremely insensitive articles which do not have a mass explosion hazard:
articles which contain only extremely insensitive ►M4  ————— ◄ substances or mixtures and which demonstrate a negligible probability of accidental initiation or propagation.
2.1.2.3. Explosives, which are not classified as an unstable explosive, shall be classified in one of the six divisions referred to in paragraph 2.1.2.2 of this Annex based on Test Series 2 to 8 in Part I of the ►M4  UN RTDG ◄ , Manual of Tests and Criteria according to the results of the tests laid down in Table 2.1.1:


Table 2.1.1

Criteria for explosives

Category

Criteria

Unstable explosives or explosives of Divisions 1.1 to 1.6

For explosives of Divisions 1.1 to 1.6, the following are the core set of tests that need to be performed:

Explosibility: according to UN Test Series 2 (section 12 of the ►M4  UN RTDG ◄ , Manual of Tests and Criteria). Intentional explosives () shall not be subject to UN Test Series 2.

Sensitiveness: according to UN Test Series 3 (section 13 of the ►M4  UN RTDG ◄ , Manual of Tests and Criteria).

Thermal stability: according to UN Test 3(c) (sub-section 13.6.1 of the ►M4  UN RTDG ◄ , Manual of Tests and Criteria).

Further tests are necessary to allocate the correct Division.

(1)   This comprises substances, mixtures and articles which are manufactured with a view to producing a practical, explosive or pyrotechnic effect.

2.1.2.4. If explosives are unpackaged or repacked in packaging other than the original or similar packaging, they shall be retested.