What type of explosives are included in Group A storage compatibility?

Initiating explosives are categorized in Group A storage compatibility due to their specific properties and characteristics that require stringent handling and storage conditions. These types of explosives are sensitive and can initiate a detonation under relatively low energy conditions, which is why they are placed in a group that requires careful segregation from other types of explosives to prevent accidental ignition or detonation.

In storage practices, it is essential to minimize the risks associated with more sensitive materials like initiating explosives, which include items such as detonators and boosters. This careful classification aligns with safety regulations aimed at reducing potential hazards in storage facilities and during transportation.

While the other types of explosives mentioned also have specific storage requirements, they do not fall under Group A storage compatibility. Bulk secondary high explosives and propellant charges have different handling and storage considerations, often requiring separation from more sensitive explosives to ensure safety and compliance with regulatory standards. Fireworks also have their own distinct classification that does not overlap with the requirements for initiating explosives. Thus, focusing on the unique properties of initiating explosives clarifies why they are categorized under Group A.