The chemical that could have killed millions in the Philly refinery fire

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A fire burns at the Philadelphia Energy Solutions refinery hours after a series of early morning explosions on June 21, 2019. (Emma Lee/WHYY)

A fire burns at the Philadelphia Energy Solutions refinery hours after a series of early morning explosions on June 21, 2019. (Emma Lee/WHYY)

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Hydrofluoric acid is a toxic chemical used in local refineries, including Philadelphia Energy Solutions where part of the refinery exploded last month. StateImpact Pennsylvania reporter Susan Phillips explains why a release of HF would have been disastrous. Could public backlash push the refining industry to stop using it?

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