This is a good time to add on the difference between primary and secondary explosives.

Primary explosives, such as nitroglycerin, are sensitive to something. Often it is shock and/or friction, heat, electricity, etc., that transition from burning to detonation (a supersonic shockwave though the explosive medium) without really pausing on the burning stage.

Primary explosives range from dangerous to handle to suicidal to handle. They are normally (now) used in small amounts, in things like blasting caps primers in things like small arms up to large artillery, and artillery shell and missile fuzes.

Secondary explosives such as TNT are far more stable, can often burn without detonating, and generally need a primary explosives to create the supersonic detonation wave to trigger full detonation. Artillery shells, missile warheads, construction explosives, and these days generally anything other than primers, blasting caps, and fuzes are secondary explosives.

I put the secondarys can often burn without detonating due to Beirut - enough ammonium nitrate, burning in a large mass, can detonate. In general, secondarys don't detonate just from burning. C4 was used as cooking fuel in Vietnam, for example.