Beirut explosion: Uncovered pictures confirm 'potent explosive' stored in warehouse

Pictures of dockside warehouses filled with huge sacks of the volatile chemical, which is used as a fertiliser but also in bombs, have emerged on social media. President Michel Aoun said 2,750 tonnes of ammonium nitrate had been stored for six years at the port without any safety measures which he described as “unacceptable”. A ship carrying a similar quantity of the chemical is understood to have unloaded its cargo at the port in 2013.

Prime Minister Hassan Diab promised there would be accountability for the blast at the “dangerous warehouse” and said: “Those responsible will pay the price.”

Officials have not said what caused the initial blaze that sparked the enormous explosion but a security source told local media it was started by welding work being carried out on a hole in the warehouse.

Ammonium nitrate is a common industrial chemical used mainly as a fertiliser because it is a good source of nitrogen for crops.

But it is also one of the main components in mining explosives.

Gabriel da Silva, a senior lecturer in chemical engineering at the University of Melbourne, said ammonium nitrate was not explosive on its own but was an oxidiser which draws oxygen into a fire and makes it much more intense.

READ MORE: Beirut explosion: PM confirms British nationals caught in huge blast

He said it would only explode under the right conditions which are difficult to achieve.

Mr da Silva said ammonium nitrate could be actually be used to extinguish a fire but becomes unstable and highly explosive if contaminated by substances such as oil.

Footage of yesterday’s explosion showed a column of smoke rising from the port followed by an enormous blast which sent a white mushroom cloud and a fireball into the sky.

Beirut’s mayor Jamal Itani said: “It’s like a war zone. I’m speechless.

“This is a catastrophe for Beirut and Lebanon.”

The US embassy in Beirut warned residents about reports of toxic gases released by the blast, urging people to stay indoors and wear masks.


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