What does "Hazard Class 1.3" signify regarding explosives?

"Hazard Class 1.3" refers specifically to explosives that are categorized as having a potential mass explosion hazard, but they primarily present a significant risk of a localized fire hazard. This class includes items that might cause limited blast effects, such as shrapnel, but predominantly pose threats related to fire. The designation indicates that while the explosives can be dangerous, their characteristics allow for some controlled handling and storage, distinguishing them from more hazardous classes such as 1.1, which involve a more severe mass explosion risk.

The other classifications discussed do not accurately reflect the properties of Hazard Class 1.3. For instance, explosives with a high fire hazard specifically belong to another class and are not characterized by mass explosive potential. Similarly, explosives classified as stable and non-hazardous fall far below Hazard Class 1 and do not indicate any risk. Non-explosive chemicals, on the other hand, do not fall under the explosive classifications at all, further underscoring the specific nature of Hazard Class 1.3.