Dynamite

Contents

1. Overview
2. Etymology
3. Cultural Impact

Dynamite: An Explosive Concoction of Nitroglycerin

This article meticulously details the high explosive known as dynamite. For other interpretations of this term, one might reluctantly consult Dynamite (disambiguation) .

Preparation of dynamite during the construction of the Douglas Dam , 1942

Classification	Explosive
Industry	Various
Application	Explosion
Invented	1866 (159 years ago) (1866)

Diagram

One might consider this a blueprint for controlled chaos, though “controlled” is often a relative term when dealing with such volatile substances. The fundamental components of a conventional dynamite stick include:

Diatomaceous earth (or any other type of inert, absorbent material, chosen with varying degrees of success over the years) thoroughly saturated with nitroglycerin . This unassuming mixture forms the core, holding the explosive power in a deceptively stable embrace.
A protective coating designed to encase and contain the explosive material, providing a minimal barrier against premature enthusiasm.
A blasting cap , the crucial initiator, without which the entire endeavor remains a rather inert stick.
An electrical cable (or a traditional fuse ) connected directly to the blasting cap, providing the necessary conduit for the spark of destruction from a safe, or at least safer, distance.

Dynamite, as a formidable explosive , is fundamentally composed of nitroglycerin —a substance whose very existence seems to defy common sense—combined with various sorbents (such as finely powdered shells, clays, or the now-iconic diatomaceous earth) and carefully selected stabilizers . The invention of this potent compound is credited to the Swedish chemist and engineer Alfred Nobel , who first brought it into existence in the rather unremarkable town of Geesthacht , situated in Northern Germany. Nobel secured his patented claim to this innovation in 1867. Its adoption was, predictably, swift and widespread. Dynamite rapidly superseded the more traditional black powder explosives, offering a significantly more robust and powerful alternative. Its genius lay in its ability to harness the formidable, albeit notoriously capricious, explosive properties of nitroglycerin while simultaneously, and crucially, mitigating the harrowing risk of accidental, spontaneous detonation—a problem that had, until then, plagued anyone daring enough to work with the liquid explosive.

History

“Nobels extradynamit” manufactured by Nobel’s old company, Nitroglycerin Aktiebolaget

Women mixing dynamite at Nobel’s Ardeer factory, 1897

The story of dynamite, like many tales of human ingenuity, is one of brilliance born from necessity and shadowed by tragedy. It was the brainchild of the Swedish chemist Alfred Nobel , conceived in 1866. This invention marked a pivotal moment, as it represented the first safely manageable explosive that surpassed the raw power of black powder . Before Nobel, working with high explosives was often a gamble with grim odds, a situation that humanity, naturally, found utterly intolerable.

Alfred Nobel’s lineage played a significant role in his path. His father, Immanuel Nobel , was a man of considerable drive—an industrialist, engineer, and inventor in his own right. Immanuel made his mark by constructing numerous bridges and buildings within Stockholm , and, ever the pioneer, established Sweden’s inaugural rubber factory. His extensive work in construction undoubtedly instilled in him, and subsequently in Alfred, a profound appreciation for the need for more efficient methods of blasting rock—methods that would far exceed the capabilities of the then-standard black powder. Following a series of unfortunate business ventures in Sweden, Immanuel, in 1838, relocated his family to Saint Petersburg , Russia. It was there that Alfred, along with his brothers, received a private education under the tutelage of both Swedish and Russian instructors, laying a diverse intellectual foundation. At the tender age of 17, Alfred Nobel was sent abroad for two years , a journey that would profoundly shape his future. During this period, he encountered the renowned Swedish engineer John Ericsson in the United States. More critically, in France, he studied under the tutelage of the esteemed chemist Théophile-Jules Pelouze and Pelouze’s brilliant pupil, Ascanio Sobrero . It was Sobrero who, in 1847, had first successfully synthesized nitroglycerin . Pelouze, with a wisdom born of experience and perhaps a touch of dread, explicitly cautioned Nobel against any notion of utilizing nitroglycerine as a commercial explosive, citing its extreme and unpredictable sensitivity to shock. A warning, it seems, that only served to pique Nobel’s interest further.

Despite the dire warnings, Nobel remained captivated by nitroglycerin’s immense potential. In 1857, he filed the first of what would become several hundred patents , initially focusing on air pressure, gas, and fluid gauges. Yet, the allure of nitroglycerin’s explosive power continued to draw him in. Nobel, working alongside his father and his brother Emil , embarked on a series of perilous experiments, testing various combinations of nitroglycerin and black powder. His persistent efforts eventually bore fruit, leading to a crucial breakthrough: a method to safely detonate nitroglycerin. This involved the invention of the detonator , commonly known as the blasting cap. This ingenious device allowed for a controlled explosion to be initiated remotely, using a simple fuse . By 1863, Nobel achieved his first documented successful detonation of pure nitroglycerin, employing a blasting cap fabricated from a copper percussion cap and a small quantity of mercury fulminate . The following year, in 1864, Alfred Nobel formally filed patents for both his innovative blasting cap and his sophisticated method of synthesizing nitroglycerin, a process involving the careful combination of sulfuric acid , nitric acid, and glycerin. However, this period of scientific advancement was tragically punctuated. On 3 September 1864, during an experimental phase involving nitroglycerin, Emil Nobel and several other individuals lost their lives in a devastating explosion that tore through the factory located on Immanuel Nobel’s estate at Heleneborg . This profound personal loss undoubtedly underscored the dire need for greater safety. In the wake of this disaster, Alfred founded the company Nitroglycerin Aktiebolaget in Vinterviken , specifically to continue his hazardous work in a more isolated and, one hoped, safer location. The very next year, he relocated to Germany, establishing yet another enterprise, Dynamit Nobel . [2]

Even with the groundbreaking invention of the blasting cap, the inherent instability of raw nitroglycerin rendered it practically useless as a commercially viable explosive. Its temperamental nature made transport and handling a constant, terrifying gamble. To overcome this formidable challenge, Nobel embarked on a relentless quest to combine nitroglycerin with another substance—one that would render it safe for transit and manipulation without, crucially, diminishing its formidable explosive efficacy. He experimented with a plethora of materials, including cement, coal dust, and sawdust, all of which, predictably, proved unsuccessful. Finally, in an act of desperation or perhaps cosmic irony, he turned to diatomaceous earth . This seemingly innocuous substance, composed of the fossilized remains of ancient algae, which he sourced from the banks of the Elbe River near his factory in Hamburg , proved to be the magic ingredient. It successfully absorbed the nitroglycerin, transforming the volatile liquid into a stable, portable explosive paste. [2] And just like that, the world got its first truly practical high explosive.

Nobel, ever the astute businessman, secured the necessary legal protections for his revolutionary inventions, obtaining patents in England on 7 May 1867, followed by a Swedish patent on 19 October 1867. [3] Upon its official introduction, dynamite was met with immediate and widespread acclaim, quickly becoming the preferred, safe alternative to both the antiquated black powder and the terrifyingly unstable pure nitroglycerin. Nobel, keenly aware of the value of his intellectual property, maintained stringent control over his patents, swiftly moving to shut down any unlicensed duplicating companies that dared to infringe. Interestingly, a few enterprising American businessmen found a loophole, circumventing Nobel’s patent by utilizing alternative absorbent materials, such as resin, instead of diatomaceous earth. [4] A testament, perhaps, to humanity’s relentless pursuit of profit, even in the face of legal restrictions.

Initially, Nobel marketed his groundbreaking explosive as “Nobel’s Blasting Powder.” However, he later, and perhaps more fittingly, rebranded it as “dynamite.” This name was derived from the Ancient Greek word dýnamis (δύναμις), a term that translates quite literally to “power.” [5] [6] A rather on-the-nose choice, one might say, for a substance designed to unleash immense force.

Manufacture

The creation of dynamite, while seemingly straightforward in principle, involves precise formulation to balance potency with a semblance of safety.

Form

Dynamite is typically distributed in the form of robust cardboard cylinders, each measuring approximately 200 millimeters (or roughly 8 inches) in length and about 32 millimeters (or 1 and 1/4 inches) in diameter. These standardized “sticks” usually possess a mass of around 190 grams (which equates to roughly 1/2 troy pound), a convenient size for handling and placement in boreholes. [7] Each stick of dynamite, so meticulously produced, contains an impressive energetic payload, roughly equivalent to 1 megajoule of energy. [8] Of course, for those with more specific demolition needs, other sizes are also available, often rated by either fractional portions (e.g., “Quarter-Stick” or “Half-Stick”) or by their precise weight.

The potency of dynamite is commonly quantified by its “weight strength,” which directly refers to the proportion of nitroglycerin it contains. This rating typically ranges from 20% to a more aggressive 60%. To illustrate, a stick of 40% dynamite is precisely what it sounds like: 40% of its total mass is pure nitroglycerin, with the remaining 60% comprising the “dope”—the absorbent storage medium meticulously blended with the chosen stabilizer and any other necessary additives. This precise formulation allows for a tailored explosive effect, depending on the specific application.

Storage considerations

One might optimistically hope for an infinite shelf life for something so inherently dangerous, but alas, even dynamite has its limits. The maximum recommended shelf life for nitroglycerin-based dynamite is generally stipulated as one year from its date of manufacture, provided, of course, that it is stored under optimal conditions. [7] “Optimal conditions” being a phrase often uttered before disaster strikes.

A critical, and frankly unsettling, consideration is the phenomenon of “weeping” or “sweating.” Over time, and irrespective of the specific sorbent material employed, sticks of dynamite are prone to exude nitroglycerin. This highly sensitive liquid can then accumulate, forming dangerous pools at the bottom of storage boxes or within the storage area itself. This is, to put it mildly, an undesirable development. Consequently, established explosive manuals, born from generations of hard-learned lessons, emphatically recommend the regular, careful upending of boxes of dynamite in storage. The intention is to redistribute any migrating nitroglycerin, preventing hazardous concentrations. Furthermore, this weeping can lead to the formation of nitroglycerin crystals on the exterior of the sticks. These crystals are, quite notoriously, even more sensitive to shock, friction, and temperature fluctuations than the original liquid, transforming an already precarious situation into one of extreme peril. Fortunately, modern packaging techniques have somewhat mitigated this issue, often involving the placement of dynamite into sealed plastic bags and the use of wax-coated cardboard, creating a slightly more robust barrier against its inherent instability.

Despite its fearsome reputation, dynamite is only moderately sensitive to shock, a characteristic that made it a revolutionary improvement over pure nitroglycerin. Tests to quantify this resistance are typically performed using a drop-hammer apparatus: a minute quantity, approximately 100 milligrams, of the explosive is carefully positioned on an anvil. A weight, ranging from 0.5 to 10 kilograms (1 to 22 pounds), is then dropped from incrementally increasing heights until the explosive detonates. [9] The results are illuminating, if not entirely comforting. For instance, with a 2-kilogram hammer, highly volatile mercury fulminate detonates with a mere drop distance of 1 to 2 centimeters. Pure nitroglycerin, predictably, follows closely, requiring only 4 to 5 centimeters. Dynamite, by comparison, exhibits a significantly greater resilience, detonating only when the hammer falls from 15 to 30 centimeters. Even more robust are ammoniacal explosives, which demand a drop of 40 to 50 centimeters. This comparative insensitivity is precisely what allowed dynamite to transition from a laboratory curiosity to a cornerstone of industrial endeavor, though “moderate” sensitivity still means one should approach it with the utmost, and perhaps existential, caution.

Major Manufacturers

The demand for dynamite, driven by humanity’s relentless pursuit of resources and infrastructure, spurred the growth of significant manufacturing operations across the globe.

Advertisement for the Ætna Explosives Company of New York.

South Africa

For several decades, particularly commencing in the 1940s, the Union of South Africa held the dubious distinction of being the world’s preeminent producer of dynamite. This industrial might was largely fueled by the country’s vast mineral wealth. The colossal De Beers company, recognizing the immense need for explosives in the burgeoning mining industry, established a formidable factory in 1902 at Somerset West . This explosives manufacturing facility was subsequently operated by AECI (African Explosives and Chemical Industries). The insatiable demand for dynamite originated predominantly from South Africa’s extensive gold mines, which were heavily concentrated on the Witwatersrand reef. The factory at Somerset West commenced operations in 1903, and its output quickly escalated. By 1907, it was already churning out an astonishing 340,000 cases annually, each case weighing 23 kilograms (or 50 pounds). Not to be outdone, a rival factory located at Modderfontein was, at the same time, contributing an additional 200,000 cases per year to the national supply. [10] The sheer scale of this production highlights the critical role dynamite played in shaping the South African economy and literally moving mountains of earth.

The history of these manufacturing sites, however, is not without its grim footnotes. The Somerset West plant experienced two major explosions during the 1960s. While some workers tragically lost their lives, the overall casualty count was mitigated by the factory’s foresightful modular design and the strategic placement of earthworks, which were specifically engineered to direct the force of any blasts upwards, away from surrounding structures and personnel. The planting of trees also played a role in containing the concussive force. The Modderfontein factory, too, was the site of several other, equally unfortunate, explosions. These incidents, though regrettable, served as stark reminders of the inherent dangers of explosive manufacturing. After 1985, mounting pressure from increasingly vocal trade unions compelled AECI to systematically phase out the production of traditional nitroglycerin-based dynamite. The factory then pivoted its operations, shifting to the manufacture of ammonium nitrate emulsion-based explosives, which are significantly safer both to produce and to handle. [11] A sensible, if belated, evolution.

United States

In the United States, the earliest domestic production of dynamite commenced with the Giant Powder Company of San Francisco , California. The shrewd founder of this company had, in 1867, secured the exclusive rights to Nobel’s patent in the American market, a testament to the immediate recognition of dynamite’s commercial potential. Giant Powder Company eventually fell under the expansive corporate umbrella of DuPont , which continued to produce dynamite under the venerable Giant name until the company was formally dissolved by DuPont in 1905. [12]

Following this dissolution, DuPont manufactured dynamite under its own brand until a significant legal challenge arose in 1911–12. Its near-monopoly on explosives was decisively broken up by the U.S. Circuit Court in what became known as the “Powder Case.” This legal intervention led to the formation of two entirely new entities: the Hercules Powder Company and the Atlas Powder Company . Both of these new corporations subsequently took up the mantle of dynamite manufacturing, albeit utilizing their own distinct formulations. The corporate landscape shifted, but the fundamental product, the means to reshape the earth with a bang, remained.

Currently, the manufacturing of traditional dynamite in the United States is largely consolidated. Only Dyno Nobel maintains a facility for its production, specifically located in Carthage, Missouri . However, it’s worth noting that while Dyno Nobel is the sole producer of the raw material, other manufacturers often purchase this dynamite from them and then apply their own labels to the product and its packaging, a common practice in the industrial sector.

Non-dynamite explosives

It’s truly remarkable how often people conflate different explosives, as if any substance designed to violently expand is simply “dynamite.” A rather simplistic view of a complex, destructive art.

Trinitrotoluene (TNT)

Trinitrotoluene , universally recognized by its acronym TNT, is perhaps the most egregious victim of this common misconception, frequently assumed to be identical to, or confused with, dynamite. This widespread error is largely attributable to the pervasive presence of both explosives throughout the 20th century, particularly in popular culture. The incorrect association between TNT and dynamite was, unfortunately, cemented by ubiquitous cartoons, such as those featuring Bugs Bunny . In these animated shorts, illustrators, perhaps for expediency or simply a lack of precise knowledge, labeled virtually any explosive device—from sticks strikingly resembling dynamite to kegs of black powder —with the clear, concise initialism “TNT.” The initialism was undoubtedly shorter, more memorable, and, crucially, did not necessitate a high degree of literacy for audiences to grasp that “TNT” signified “bomb.” [Citation needed, naturally, for the precise psychological impact of cartoon explosives.]

However, setting aside their shared classification as high explosives, TNT and dynamite possess remarkably few similarities. TNT is a distinctly second-generation castable explosive , which gained significant favor within military applications. Dynamite, in stark contrast, has never achieved widespread popularity in warfare. Its primary drawbacks include its relatively rapid degeneration under severe environmental conditions and its susceptibility to detonation by either fire or an errant bullet. The German armed forces, demonstrating a pragmatic embrace of superior technology, adopted TNT as a standard filling for artillery shells in 1902, a full four decades after the initial invention of dynamite. Dynamite, it must be remembered, is a first-generation phlegmatized explosive , primarily conceived and engineered for civilian earthmoving projects, a task it performs with commendable efficiency. TNT, conversely, has never truly gained traction or widespread use in civilian earthmoving operations. This is due to several critical factors: it is considerably more expensive to produce than dynamite, less powerful by weight for most applications, [13] and notably slower to mix and pack into boreholes. TNT’s crowning asset, the quality that endeared it to military strategists, is its remarkable insensitivity and stability. It is inherently waterproof and, crucially, incapable of detonating without the extreme shock and heat reliably provided by a blasting cap (or, in more extreme circumstances, a sympathetic detonation ). This inherent stability also bestows upon it another invaluable property: it can be melted at a relatively low temperature of 81°C (178°F), poured into high explosive shells , and allowed to re-solidify without any additional danger or alteration to its explosive characteristics. [14] Consequently, a staggering majority—over 90%—of all TNT produced in the United States historically served the military market. Most of this was dedicated to filling shells, hand grenades , and aerial bombs , with the remainder typically packaged in brown “bricks” (distinctly not the iconic red cylinders of dynamite) for use as specialized demolition charges by combat engineers . A nuanced distinction, one would hope, that is now abundantly clear.

“Extra” dynamite

In 1885, within the United States, the chemist Russell S. Penniman introduced a notable variation known as “ammonium dynamite.” This particular form of explosive represented a significant advancement, primarily because it judiciously employed ammonium nitrate as a more cost-effective substitute for a portion of the more expensive nitroglycerin. While ammonium nitrate possesses approximately 85% of the chemical energy of nitroglycerin, [15] its economic advantage made it an attractive alternative for certain applications.

This variant is typically rated by one of two metrics: either “weight strength” (which quantifies the precise amount of ammonium nitrate present within the explosive medium) or “cartridge strength” (a more nuanced measure that assesses the potential explosive strength generated by a specific quantity of the explosive, taking into account its density and grain size, in comparison to the explosive strength produced by an equivalent density and grain size of a recognized standard explosive). To illustrate, a high-explosive 65% Extra dynamite, when rated by weight strength, indicates that it comprises 65% ammonium nitrate and 35% “dope” (the absorbent medium meticulously blended with the necessary stabilizers and other additives). Its “cartridge strength,” on the other hand, would be expressed as its weight in pounds multiplied by its strength relative to an equal amount of ANFO (the established civilian baseline standard) or TNT (the military baseline standard). For instance, a 65% ammonium dynamite possessing a 20% cartridge strength would imply that a stick of this particular explosive delivered an equivalent weight strength to 20% ANFO. These detailed classifications allow for precise application and predictable outcomes, which is, admittedly, rather crucial when one is intentionally detonating things.

“Military dynamite”

“Military dynamite” (often designated as M1 dynamite) is, rather tellingly, a dynamite substitute. It was developed with a clear mandate: to utilize more stable ingredients than the notoriously temperamental nitroglycerin. [16] This specialized formulation typically consists of 75% RDX , 15% TNT, and 10% desensitizers and plasticizers. While it possesses only 60% of the equivalent strength of commercial dynamite, this reduction in power is a deliberate trade-off for significantly enhanced safety in storage and handling. [17] In military contexts, where unpredictable conditions and the need for robust reliability are paramount, a slightly less potent but far more stable explosive is, quite logically, the preferred option. One would rather not have one’s demolition charges spontaneously ignite during transport, after all.

Regulation

Main article: Explosive material § Regulation

Predictably, humanity, in its infinite wisdom, has deemed it necessary to attempt to control the distribution and use of substances designed to violently rearrange matter. Various nations across the globe have enacted a labyrinthine array of laws and regulations pertaining to explosives. These legislative frameworks invariably mandate licenses for the manufacture, distribution, storage, use, and even mere possession of explosives or their constituent ingredients. [2] One might ponder the efficacy of such bureaucratic efforts in preventing those truly determined from acquiring or creating such devices, but the paperwork, at least, is meticulously maintained.