Lesson 1, Topic 1
In Progress

Primary and Subsidiary classification


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Some dangerous goods offer more than one hazard.  Therefore, they can meet the criteria of more than one class.  The “Primary” classification is always indicated first and is then followed by the “Subsidiary” class or classes.

For Example:

Methanol is primarily flammable, but it is also toxic.  So the primary classification is Class 3 and the secondary or subsidiary danger is Class 6, Division 1.

  It would appear as: Class 3 (6.1)