![](http://www.ecns.cn/hd/2023/02/15/6b8e9669b7fd450ea43e825bf4167118.jpg)
Photo shows the freight train carrying vinyl chloride, a colorless gas that burns easily and is produced industrially for its commercial uses derailed in the village of East Palestine, Ohio, U.S., Feb. 6, 2023. (Photo/VCG)
About 50 Norfolk Southern freight train cars derailed on the night of Feb. 3 in East Palestine.
Vinyl chloride exposure is associated with an increased risk of a rare form of liver cancer, as well as primary liver cancer, brain and lung cancers, lymphoma, and leukemia.
![](http://www.ecns.cn/hd/2023/02/15/d252da1c275d42ac9277f92efd7120d9.jpg)
Photo shows the freight train carrying vinyl chloride, a colorless gas that burns easily and is produced industrially for its commercial uses derailed in the village of East Palestine, Ohio, U.S., Feb. 6, 2023. (Photo/VCG)
![](http://www.ecns.cn/hd/2023/02/15/3222e1c1818d42f09d91c178765a01ce.jpg)
Photo shows the freight train carrying vinyl chloride, a colorless gas that burns easily and is produced industrially for its commercial uses derailed in the village of East Palestine, Ohio, U.S., Feb. 6, 2023. (Photo/VCG)
![](http://www.ecns.cn/hd/2023/02/15/9d05157448e84e7db55e87b1f610474c.jpg)
Photo shows the freight train carrying vinyl chloride, a colorless gas that burns easily and is produced industrially for its commercial uses derailed in the village of East Palestine, Ohio, U.S., Feb. 6, 2023. (Photo/VCG)