Final answer:
Division 1.1 of explosive hazard class 1 is principally associated with items that have a fragmentation and blast hazard.
Step-by-step explanation:
The division of explosive hazard class 1 that is principally associated with items that have a fragmentation and blast hazard is Division 1.1.
Division 1.1 includes explosive substances or articles that have a mass explosion hazard. These items can cause an explosion in almost all circumstances, such as dynamite and TNT.
Another division that is associated with fragmentation and blast hazards is Division 1.2, which includes explosive substances or articles with a projection hazard but a lesser mass explosion hazard.