Route 50 and state route 128, west of cincinnati, that holds styrene, a toxic and highly flammable chemical. Styrene, a toxic and flammable chemical that is used to make plastic and rubber, began leaking tuesday afternoon from a railcar in whitewater township. Dangerous chemical leak spurs evacuation order in ohio town 1 of 4 | students in school buildings and residents in neighboring homes were told to evacuate after a dangerous chemical began leaking from a railcar tuesday near cincinnati. An evacuation order remains in effect for residents in an ohio community as crews work at the scene of a dangerous chemical leak. Students in school buildings and residents in hundreds of neighboring homes were told to evacuate after officials discovered styrene, a toxic and flammable chemical used to make plastic and rubber, was. Plumes of white vapor shot out from a pressure release valve of a rail car, leaking styrene — a toxic chemical — that saturated the area in a pungent odor midday tuesday.
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