Ko te Cupric sulfate he tote i hangaia ma te rongoa i te waikura kapu ki te waikawa pungatara.Ka puta mai he kiripiri kikorangi kikorangi kanapa e rima nga ngota ngota wai (CuSO4∙5H2O) ka mohiotia ano he vitriol puru.Ka hangaia te tote waikore ma te whakamahana i te waiwai ki te 150 °C (300 °F).