Wikipedia
Cobalt(II) sulfate
Cobalt(II) sulfate is any of the inorganic compounds with the formula CoSO(HO). Usually cobalt sulfate refers to the hydrate CoSO7HO, which is one of the most commonly available salts of cobalt.
Usage examples of "cobalt sulfate".
In the mid 60s, for instance, about 50 people died when brewers began putting cobalt sulfate into their products as a foaming agent.