pH5.5 to 7.5 (10g/L, 25 deg-C)Drying lossmax. 10.0 %Ignition residue(Sulfate)23.0 to 31.0 %(calcd.on dried substance)Total Nitrogen2.5 to 3.8 %(calcd.on dried substance)Total Sulfur5.5 to 7.5 %(after drying)