that the finished product, as mixed for use or shipment, cannot be detonated by means of a No. 8 test blasting cap (detonator) when unconfined. For transportation, Title 49, Code of Federal Regulations, Section 173.50 defines Class 1, Division 1.5 (blasting agent) as a substance that presents a mass explosion hazard but is so insensitive that there is very little probability of initiation or of transition from burning to detonation under normal conditions in transport. [I]

Blasting cap

See Detonator. [I]


An explosive charge, usually of high detonation velocity and detonation pressure, designed to be used in the explosive initiation sequence between an initiator or primer and the main charge. [I]


A hole drilled in the material to be blasted, for the purpose of containing an explosive charge. [I]

Bridge wire

A resistance wire connecting the ends of the leg wires inside an electric detonator and which is embedded in the ignition charge of the detonator. [I]

Bulk explosive

An unpackaged explosive, such as ANFO, that is typically shipped in trucks directly to the blasting site.


See Detonator.

Cap-Sensitive Explosive Material

An explosive material that will detonate with a No. 8 test detonator when the material is unconfined. [I]

Coincident gamma emitter

A radioactive material that, upon decay, simultaneously releases two gamma rays, thereby making it detectable by use of several counters with coincident decision logic.

Commercial explosive

An explosive designed, produced, and used for commercial or industrial applications rather than for military purposes. [I]


A unit of radioactivity equal to 3.7 × 1010 disintegrations per second.

Date-shift code

A code, required by the Bureau of Alcohol, Tobacco, and Firearms, applied by manufacturers to the outside of shipping containers and, in many instances, to the immediate containers of explosive materials to aid in their identification and tracing. [I]


An explosive reaction such as a rapid combustion that moves

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