Final answer:
Division 1.4 explosives include items like pistol and rifle ammunition or impulse cartridges, which pose a minor explosion hazard mainly associated with fire risk during transport or storage.
Step-by-step explanation:
The hazard class 1 division that typically includes items such as pistol and rifle ammunition or impulse cartridges is Division 1.4. These are explosives that present a minor explosion hazard. The main risk with these materials is that they could start a fire, but they have been designed in such a way that any explosion is unlikely to cause significant damage if they do detonate.
Division 1.4 explosives include items that are intended to function by explosion, such as cartridges for firearms and starter pistol blanks. The risk for these items is primarily during transport or improper storage. Proper handling and compliance with regulations are essential to ensure safety when dealing with these types of explosive materials.