This document is applicable to iron-based coagulants used for treatment of water intended for human consumption. It specifies analytical methods to be used for products described in EN 888 (Iron (III) chloride)@ EN 889 (Iron (II) sulfate)@ EN 890 (Iron (II) sulfate@ solution)@ EN 891 (Iron (III) chloride sulfate) and EN 14664 (Iron (III) sulfate@ solid).