The Tianjin explosion was the largest ammonium nitrate explosion that…

The Tianjin explosion was the largest ammonium nitrate explosion that I was aware of prior to today:



https://en.wikipedia.org/wiki/2015_Tianjin_explosions

However, it was only the fourth most deadly, with 189 killed. The most deadly--the Grandcamp explosion in 1947--killed 581 people.

https://en.wikipedia.org/wiki/Ammonium_nitrate_disasters

Today's explosion in Beirut will probably end up in the top five.