Chlorine (Cl #17) is the next element on the periodic table for my APEX mineral collection.Wikipedia Chlorine
Chlorine Minerals - Most Chlorine minerals are ionic compounds (salts).
My Chlorine APEX mineral will have to be a salt even though I am trying to avoid these. In this case, it turns out ordinary table salt (NaCl) at 61% Chlorine is by far the best choice.
Salt was used as early as 3000 BC and brine as early as 6000 BC
Chlorine is a critical ingredient to many industrial processes. Chlorine compounds are often used as a disinfectant and cleaner.