What are the dangers associated with a copper sulfate CuSO4 + Water H2O solution aprox 5 gallons at room temperature in a room with no ventilation.

Will there be hazardous gases in the room? is the evaporation of this solution harmful in any way to animals or humans? 




When a solution of copper(II) sulphate evaporates, the only gaseous product is water vapour. Like any ionic compound, copper(II) sulphate will be left behind as a solid residue — presumably crystalline — after water evaporation.


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