Some tank cars are labeled with the chemical they contain. Caustic soda is another name for Sodium Hydroxide which is used as a drain cleaner. It is also used in soap, paper and textile production.
Magnesium Hydroxide is also known as milk of magnesia, commonly used as an antacid and to relieve constipation.
Waxhaw, NC 2026
It wasn't clear in a lot of cases exactly what was in some of these tank cars. Perhaps it's better we don't know.
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