4 ms·

What about Barium? Water-soluble barium compounds are toxic while the insoluble barium sulfate is used as radiocontrast agent. https://en.wikipedia.org/wiki/Ba

• voldacar 6y ago
  Well sulfates in general tend to be highly insoluble in water, and therefore biologically inert, so I think this is still kind of a cherry-picked example
  • avianlyric 6y ago
    Isn’t cherry-picking kind of the point here?