Chemical experts say recent refinery explosions could have been far more devastating if deadly hydrogen fluoride was released. Some are calling for a ban on the chemical.
A 2013 report released by the United Steelworkers, the union that represents refinery workers, warned that facilities using HF don't have adequate safety measures in place and are unprepared for a release. It said this puts 12,000 workers and 13 million residents at risk of exposure, including in major metropolitan areas like Houston, Memphis and Salt Lake City.
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