Core Names & Formulas

• Ferric sulfate

• Iron(III) sulfate (Systematic name)

• Fe₂(SO₄)₃ (Chemical formula)

• Ferric sulphate (Alternative spelling)

• Iron trisulfate

• Sulfuric acid, iron(3+) salt (3:2)

Key Applications & Uses

• Water treatment coagulant / Flocculant

• Wastewater treatment

• Phosphorus removal (wastewater)

• Odor control (H₂S)

• Sludge conditioning

• Industrial coagulant

• Metal surface treatment / Etchant (e.g., for copper, steel)

• Catalyst (e.g., in organic synthesis)

• Pigment production

• Soil amendment (rarely)

• Chemical reagent (Laboratory)

• Mordant (historical textile dyeing)

Properties & Characteristics

• Yellow crystals / Pale yellow solid

• Hygroscopic

• Soluble in water

• Acidic solution (aqueous)

• Corrosive

• Molar mass (399.88 g/mol for anhydrous)

• CAS Number (10028-22-5 for anhydrous)

• Decomposes on heating

• Oxidizing agent (mild)

Related Compounds & Concepts

• Ferric chloride (FeCl₃ - common alternative coagulant)

• Ferrous sulfate (FeSO₄ / Iron(II) sulfate)

• Alum / Aluminum sulfate (Al₂(SO₄)₃ - common alternative coagulant)

• Coagulation (water treatment)

• Flocculation

• Jar test (coagulant dosing test)

• Hydrolysis (of Fe³⁺ ions)

• Polyferric sulfate (PFS - polymerized form)

Safety & Handling

• Corrosive substance

• Irritant (skin, eyes, respiratory)

• MSDS (Material Safety Data Sheet) / SDS (Safety Data Sheet)

• Handling precautions

Context-Specific Keywords

• Drinking water treatment

• Industrial effluent treatment

• Leachate treatment

• Municipal wastewater

• Analytical chemistry

• Catalyst support

• Battery materials (research context)