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The Biggest Ammonium Nitrate Explosions Since 2000

  • August 11, 2020
AP Photo/Hussein Malla
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A massive explosion involving ammonium nitrate rocked the city of Beirut, sending shock waves through the media.

This recent tragedy is devastating, and unfortunately, it’s not the first time this dangerous chemical compound has caused widespread damage.

This graphic outlines the biggest accidental ammonium nitrate explosions over the last 20 years.

A Brief Explanation of Ammonium Nitrate

Before getting into the details, first thing’s first—what is ammonium nitrate?

Ammonium nitrate is formed when ammonia gas is combined with liquid nitric acid. The chemical compound is widely used in agriculture as a fertilizer, but it’s also used in mining explosives. It’s highly combustible when combined with oils and other fuels, but not flammable on its own unless exposed to extremely high temperatures.

It’s actually relatively tough for a fire to cause an ammonium nitrate explosion—but that hasn’t stopped it from happening numerous times in the last few decades.

The Death Toll

Some explosions involving ammonium nitrate have been deadlier than others. Here’s a breakdown of the death toll from each blast:

Year Location Country Deaths
2015 Tianjin China 165
2004 Ryongchon North Korea 160
2020 Beirut Lebanon 157*
2007 Monclova Mexico 57
2001 Toulouse France 30
2003 Saint-Romain-en-Jarez France 26
2004 Mihăileşti Romania 18
2013 West United States 15
2004 Barracas Spain 2
2014 Wyandra Australia 0

*Note: death count in Beirut as of Aug 6, 2020. Casualty count expected to increase as more information comes available.

One of the deadliest explosions happened in Tianjin, China in 2015. A factory was storing flammable chemicals with ammonium nitrate, and because they weren’t being stored properly, one of the chemicals got too dry and caught fire. The blast killed 165 people and caused $1.1 billion dollars in damage.

In 2001, 14 years before the explosion in Tianjin, a factory exploded in Toulouse, France. The accident killed 30 people and injured 2,500. The power of the blast was equivalent to 20 to 40 tons of TNT, meaning that 40 to 80 tons of ammonium nitrate would have ignited.

In addition to factory explosions, there have been several transportation accidents involving ammonium nitrate. In 2007, a truck in Mexico blew up and killed over 57 people. Filled with explosives, the truck crashed into a pickup, caught fire, and detonated. The blast left a 60-foot long crater in its wake.

The Aftermath

While there have been several ammonium nitrate accidents throughout history, the recent tragedy in Beirut is one of the largest accidental explosions ever recorded, with 157 deaths and 5,000 injuries and counting.

In terms of TNT equivalent, a measure used to gauge the impact of an explosion, it ranks in the top 10 of the largest accidental explosions in history:

Topping the list is yet another ammonium nitrate explosion, this time back in 1947.

Known to history as the Texas City Disaster, the port accident was one of the biggest non-nuclear explosions to occur in history. The explosion killed over 500 people and injured thousands. The impact from the blast was so intense, it created a 15-foot wave that crashed along the docks and caused flooding in the area.

A Resource With Trade-Offs

Despite being dangerous, ammonium nitrate is still a valuable resource. There’s been an increased demand for the chemical from North America’s agricultural sector, and because of this, ammonium nitrate’s market size is expected to see an increase of more than 3% by 2026.

Because of its increasing market size, it’s more important than ever for trade industries to enforce proper safety measures when storing and transporting ammonium nitrate. When safety regulations aren’t followed, accidents can happen—and as we saw this week, the aftermath can be devastating.

 

By Carmen Ang

Republished from the Visual Capitalist

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  • Ammonium Nitrate
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