Which of the following best describes the characteristics of a blasting agent?

A blasting agent is primarily characterized by its classification and sensitivity. To be classified as a blasting agent, a substance must not be classified as an explosive by the Department of Transportation (DOT). This means that it does not detonate under normal conditions and requires a specific initiation system to produce an explosive effect.

In addition, blasting agents are typically utilized in controlled environments, such as mining or construction sites, where professionals can manage and monitor the conditions under which they are used. The controlled nature of these environments helps to ensure safety while maximizing efficiency in the operations that utilize these materials.

Therefore, both characteristics mentioned in the options are accurate representations of a blasting agent: it is non-classified as an explosive and is only used in controlled settings. Hence, the appropriate answer combines both characteristics.