Dangerous Goods Educational Services
Dangerous Goods Educational Services
Lesson 1, Topic 1
In Progress

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Class 1 – Explosives
(TDGR 2.9)


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Just as each class has its own number and in some cases divisions, they also have their own combination of corresponding colours and symbols to visually indicate the type of danger present.  This is displayed using hazard labels, they are as follows:

Definition: Refer to TDGR 2.9 if applicable Assigned to one of six divisions, according to the type of Explosive:

  • Class 1.1, mass explosion hazard;
  • Class 1.2, projection hazard but not a mass explosion hazard;
  • Class 1.3, fire hazard and either a minor blast hazard or minor projection hazard or both but not a mass explosion hazard;
  • Class 1.4, no significant hazard beyond the package in the event of ignition or initiation during transport;
  • Class 1.5, very insensitive substances with a mass explosion hazard; and
  • Class 1.6, extremely insensitive articles with no mass explosion hazard.

* Place for Compatibility Group, for example 1.1C

Class 1 – Explosives Compatibility Groups (TDGR 2.11)

  • For handling and stowage purposes, explosives are further separated into one of thirteen compatibility groups (not all compatibility groups are found in all divisions) which identify the kinds of explosives that are deemed to be compatible: Compatibility group A, B, C, D, E, F, G, H, J, K, L, N and S. Please refer to TDGR Part 2, Appendix 2 for detailed descriptions.
  • Explosives named and described in Schedule 1 (They also appear in Schedule 3 – Alphabetical index TDG).
  • The consignor may use a classification that was determined by the Chief Inspector of Explosives, Department of Natural Resources. TDGR 2.2 (3) (a)