A chemistry professor testified during a National Transportation Safety Board (NTSB) fact-finding hearing that the controlled burn of vinyl chloride from the Norfolk Southern train that derailed in East Palestine, Ohio earlier this year may not have been necessary.
Norfolk Southern officials says that the unified command made the decision to vent and burn the vinyl chloride, out of concern for polymerization, a molecular chemical reaction that may have caused the tanker cars to rise in temperature resulting in a disastrous explosion.
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