... Appearance: Light yellow amorphous powder, hygroscopic, readily soluble in water. 10%(W/W) aqueous solution is a transparent orange solution. PFS solid PFS ... solution: dissolve PFS in water at the concentration of 10-30% (W/W), stir until it is completely hydrolyzed. Dilute the result ... required concentration, usually 2-5% for tap water and 5-10% for industrial waste water.2. Dosage: Dosage can be ...