What hazard does a minor explosion represent in explosive divisions?

A minor explosion is classified within Division 1.4, which indicates that it involves explosives that present a minor explosion hazard. This classification is reserved for explosive materials that do not pose a significant risk of mass detonation, and when they do explode, the effects are largely contained to the immediate area of the explosion. Division 1.4 hazards are characterized by limited risk; even if a minor explosion occurs, it is not expected to produce a widespread effect or cause substantial damage beyond the immediate vicinity.

The other divisions indicate different levels of explosive hazards: Division 1.1 is for mass explosion hazards, Division 1.2 covers explosives that have a risk of projection but not mass detonation, and Division 1.5 refers to very insensitive explosives that have a low risk of accidental initiation. Each division reflects increasing levels of potential danger, with Division 1.4 being the least hazardous among them when considering the likelihood and impact of an explosion.