composed of chemical ingredients easily found in any home or local community, even if large quantities are required. Improvised explosives, just like military and commercial explosives, are typically a mixture of an oxidizer and a fuel. Regardless of type, all are extremely hazardous.
Although the components to make improvised explosives are commercially available, assembling them is not easy. A chemist may need to refine one of the components to make a viable explosive, and the refining process is often difficult and dangerous.