A car exploded near the Red Fort Metro Station in Delhi on November 10, 2025.
Investigators suspect that, the car might be carrying Ammonium Nitrate Fuel Oil (ANFO).
ANFO is a common industrial explosive made by mixing porous ammonium nitrate with fuel oil.
Ammonium nitrate is an odourless, white crystalline chemical that is commonly used to make fertiliser and explosives.
It is a powerful oxidiser and, under the right conditions, can cause a massive explosion that involves the rapid decomposition of the chemical compound into a large volume of hot gases.
The decomposition reaction from an ammonium nitrate bomb produces an exothermic reaction, releasing nitrous oxide and water vapour.
They can expand rapidly (up to 1,000 times the initial volume).
The reaction also generates significant heat, with temperatures reaching up to 2,000 degrees Celsius in the immediate vicinity.
But on its own, ammonium nitrate is not considered an explosive.