Evidence Nitroprill was main component of Beirut explosion.

Bellingcat.com has the most useful review as of August 5th and publishes a photo which they consider contemporary (a face mask present?) and located at the Beirut warehouse  (door details matched) and showing Nitroprill filling the warehouse.   Nitroprill is Ammonium Nitrate, fake brand imitating Nitropril manufactured by Orca, one "L".        Sidebar:  Follow the link to see video clip of controlled detonation of a small amount of Ammonium Nitrate in Afghanistan.