Ferric Sulfate Fe₂(SO₄)₃ - Water Treatment Chemical CAS No.: 10028-22-5 (FERRIC SULPHATE) BLU Ferric Sulphate in powder form is an effective coagulant, excellent for treating drinking water, industrial water, wastewater, sewage, and for phosphorus removal, struvite control, and sludge conditioning. Product Specifications Parameter Specification Appearance Light Yellow Powder Fe³⁺ Content 19% Min Restore Substances (Fe²⁺) Content 1.0% Max pH (1% water solution) 2.0-3.0