Ammonium perchlorate was used in the disaster that occurred in what city?
Ammonium perchlorate Ammonium perchlorate ("AP") is an inorganic compound with the formula NHClO. It is a colorless or white solid that is soluble in water. Perchlorate is a powerful oxidizer and ammonium is a good fuel. This combination explains the usefulness of this material as a rocket propellant. Its instability has involved it in a number of accidents, such as the PEPCON disaster.
1993 Bishopsgate bombing The Bishopsgate bombing occurred on Saturday 24 April 1993, when the Provisional Irish Republican Army (IRA) detonated a powerful truck bomb on Bishopsgate, a major thoroughfare in London's financial district, the City of London. Telephoned warnings were sent about an hour beforehand, but a news photographer was killed in the blast and 44 people were injured. The damage cost £350 million to repair. As a result of the bombing, which happened just over a year after the bombing of the nearby Baltic Exchange, a "ring of steel" was implemented to protect the City, and many firms introduced disaster recovery plans in case of further attacks or similar disasters.