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Alfred Nobel, a Swedish chemist and engineer, invented dynamite in the late 19th century as a safer way to harness the power of nitroglycerin for demolition. By mixing nitroglycerin with diatomaceous earth—fossilized diatom shells—Nobel created a stable, absorbent paste that could be detonated reliably with a blasting cap. While dynamite once served military purposes at the dawn of the 20th century, it now dominates industrial blasting operations worldwide.
Before chemical explosives, the Byzantines employed a formidable incendiary weapon known as “Greek fire.” Though its exact formula remains unknown, scholars suggest it consisted of a petroleum distillate (similar to modern gasoline), sulfur, and tree resins. This mixture was projected via flamethrower‑style devices, forming a sticky, water‑resistant flame that resembled today’s napalm. The petroleum component was derived from naphtha springs—crude oil seepages common in the region.
The first true chemical explosive, black powder—commonly called gunpowder—originated with Chinese alchemists in the 8th century. Its classic blend of potassium nitrate (saltpeter), sulfur, and charcoal was ground, pressed into cakes, and dried before use. Upon ignition, black powder produced dense smoke and soot, making it the dominant military explosive until the 19th century. It also powered mining blasts during the California Gold Rush. By the late 1800s, ammonium nitrate began to replace potassium nitrate in certain formulations, improving performance and reducing cost.
The advent of smokeless powder in the 19th century marked a significant leap forward. Derived from nitrocellulose—nicknamed “guncotton” after it was produced by treating cotton with nitric acid—this material offered a cleaner burn with minimal smoke. Subsequent refinements switched cotton to wood pulp, and the resulting nitrocellulose was blended with alcohol and ether, then evaporated into a hard, plastic mass. Small flakes of this stable compound became the foundation for modern propellants.
Italian chemist Ascanio Sobrero first synthesized nitroglycerin in 1846 by reacting glycerol (a by‑product of soap making) with sulfuric and nitric acids. Unlike nitrocellulose, nitroglycerin is a volatile liquid that can detonate upon minimal shock. Despite its instability, it was widely used in the 19th century for blasting in oil wells, mines, and railroad construction. Nobel’s key innovation was to stabilize nitroglycerin with absorbent materials such as diatomaceous earth and later, in modern dynamite, replace a portion with ammonium nitrate and gelatin to enhance safety and performance.
