Describe the term 'explosive residue.'

The term 'explosive residue' refers to the remaining chemicals after an explosive event. When an explosive device detonates, it undergoes a chemical reaction that produces various byproducts, which can include unreacted materials and decomposition products of the explosive compound. These residues can remain on surfaces, in the environment, or on objects in proximity to the explosion. Understanding explosive residue is vital in situational analysis, crime scene investigation, and safety assessments, as it can provide significant insights into the type and nature of the explosive used, as well as aid in determining potential hazards for cleanup and further safety measures.

The other options describe different aspects related to explosives or their aftermath but do not accurately capture the definition of explosive residue. For instance, unexploded explosives refers to devices that have not detonated, new explosive materials pertain to fresh additions of explosives, and dust created by the explosion describes a physical byproduct rather than the chemical residues that remain. Thus, the focus on chemicals left over after detonation distinctly defines 'explosive residue.'