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The police knew where to look for the likely source of the ammonium nitrate.
A customer was looking for 4,000 pounds of ammonium nitrate.
Prosecutors said ammonium nitrate was also used to make the bomb.
Ammonium nitrate is commonly used for this type of reaction.
Ten dollars buys all the ammonium nitrate you can carry.
One process for which he is seeking patents would produce ammonium nitrate.
"The next consideration is the source of the ammonium nitrate.
"Yes, almost enough ammonium nitrate for two large truck bombs, I would say."
And they recovered three empty 50-pound bags that once held ammonium nitrate.
Most calcium ammonium nitrate is used as a chemical fertilizer.
Ammonium nitrate is widely used as a fertilizer in the agricultural industry.
The root of the explosion was in a building containing ammonium nitrate.
Pure ammonium nitrate can still be legally bought with few restrictions.
But the ammonium nitrate and dozens of rifles were not all that was seized.
Ammonium nitrate forms a mild acid when mixed with water.
Police said they were made with ammonium nitrate, an ingredient for fertiliser.
In this role it acts as a substitute for ammonium nitrate based explosives.
"How could everyone have forgotten how dangerous ammonium nitrate can be?"
This makes a solution of ammonium nitrate and sodium sulfate.
For safety reasons, instant cold packs have recently been developed without ammonium nitrate.
In the basement, the agents found ammonium nitrate and blasting caps.
They also seized 1,300 pounds of ammonium nitrate fertilizer, which can be used in making bombs.
Ammonium nitrate crystals were found at the crime scene.
Calcium ammonium nitrate has seen increasing use in improvised explosives.
Some chemical products such as ammonium nitrate fertilizers can also explode.