--- https://reptox.cnesst.gouv.qc.ca/pages/fiche-complete.aspx?no_produit=41277&nom=Sulfate+d%27ammonium+ferrique Canada toxicological data sheet ferric sulfate ammonium sulfate
--- https://reptox.cnesst.gouv.qc.ca/pages/fiche-complete.aspx?no_produit=304790&nom=Sulfate+de+nickel+ammoniacal Canada French nickel ammonium sulfate ammonium nickel sulfate toxicological data sheet
--- https://reptox.cnesst.gouv.qc.ca/pages/fiche-complete.aspx?no_produit=45922&nom=Sulfate+d%27ammonium Canada French ammonium sulfate toxicological data sheet