WASHINGTON, D.C. -- On Feb. 19, a chemical reaction caused an explosion at the Concepts Science Inc. plant in Lehigh County, PA. There were five fatalities, 13 injuries and one person reported missing. The plant is used to mix potassium sulfate and hydroxylamine sulfate, which is distilled to make pure hydroxylamine. The facility is located near the Lehigh Valley Airport, though no interruption to service has been reported.
One building was leveled and three others sustained an unknown level of damage. Five state search and rescue team members from Harrisburg, as well as two dog teams, searched for nearly eight hours, until it was determined nothing else could be done to recover the victims.