Arsenism (Arsenic and its compounds): preparation, use and handling
of arsenic.
Phosphorism (Phosphorus and its compounds): preparation, use and handling
phosphorus and its compounds.
Fluorosis (Fluorine and its compounds): Mining of fluorinated
hydrofluoric acid manufacture, handling and use of it or its derivatives.
Clorismo (Chlorine and its compounds): Preparation of chlorine purification
water disinfection
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