Polyferric Sulfate (CAS 10028-22-5), widely designated in the industry as PFS, is a high-efficiency inorganic polymer coagulant functioning as a rapid settling agent and phosphorus remover in municipal and industrial wastewater treatment. Polyaluminum Chloride is a related aluminium-based coagulant for clarification-program selection. This reddish-brown powder (or liquid), chemically characterized by its high degree of polymerization and extensive molecular chain, acts to destabilize colloidal particles and suspended solids more aggressively than traditional ferric salts, forming dense, heavy flocs that precipitate quickly. We provide bulk supply of this water treatment chemical with competitive factory pricing to optimize sludge dewatering processes for utility operators. Our synthesis process ensures consistent basicity and total iron content , making MSDS, TDS, COA available alongside customized specifications to meet specific turbidity removal or drinking water safety standards.
Polyferric Sulfate (PFS) CAS 10028-22-5
- CAS: 10028-22-5
- Synonyms: PFS, Polymeric Ferric Sulfate, Polyiron sulfate, Iron polymer flocculant, Basic ferric sulfate
- Einecs: 233-072-9
- Molecular Formula: [Fe2(OH)n(SO4)3-n/2]m
- Grade: Industrial / Water Treatment Grade
- Package: 25 kg / 50 kg PP woven bag with inner PE liner (solid); 1,000 L IBC / bulk tank (liquid), or customized as required
Product Description
Product Introduction
Polyferric Sulfate is a polymerized basic ferric salt. Compared with traditional ferric sulfate or aluminum coagulants, PFS forms larger and denser flocs with higher settling velocity, even at low temperatures and in low-turbidity water. It has strong charge neutralization and bridging capabilities, effectively removing turbidity, suspended solids, COD, color, phosphate and heavy metal ions.
PFS is suitable for drinking water plants, industrial circulating water, papermaking wastewater, electroplating wastewater, printing & dyeing wastewater, mining wastewater and other fields. It shows good performance in both conventional sedimentation processes and modern clarification systems like lamella clarifiers and DAF (dissolved air flotation).
Physicochemical Properties
Typical Specifications (Solid Grade, for reference)
| Item | Unit | Typical Value |
|---|---|---|
| Appearance | – | Light yellow to yellow-brown powder |
| Fe³⁺ content | % | ≥ 20.0 |
| Basicity (basic degree) | % | 10 – 20 |
| Insoluble matter | % | ≤ 0.5 |
| pH (1% aqueous solution) | – | 2.0 – 3.0 |
| As (as As³⁺) | mg/kg | ≤ 2 |
| Pb | mg/kg | ≤ 10 |
| Cr | mg/kg | ≤ 10 |
| Cd | mg/kg | ≤ 2 |
| Hg | mg/kg | ≤ 0.5 |
| Water solubility | – | Completely soluble in water |
| Recommended dosage | g/m³ (ppm) | 10 – 60 (depending on raw water quality) |
Typical Specifications (Liquid Grade, for reference)
| Item | Unit | Typical Value |
|---|---|---|
| Appearance | – | Yellow-brown clear or slightly turbid liquid |
| Density (20 °C) | g/mL | 1.30 – 1.50 |
| Fe³⁺ content | % | ≥ 11.0 |
| Basicity | % | 8 – 18 |
| Insoluble matter | % | ≤ 0.5 |
| pH (as supplied) | – | 1.5 – 3.0 |
| Free acidity (as H₂SO₄) | % | ≤ 3.0 |
Note: Actual specification can be adjusted according to customer’s process requirements (Fe³⁺ content, basicity, impurity limits, etc.). Please send your detailed spec or current coagulant data sheet for matching.
Applications
- Drinking Water Treatment
- Coagulation and clarification of surface water (rivers, lakes, reservoirs).
- Removal of turbidity, colloids, algae, organic color and partial heavy metals.
- Good performance under low-temperature, low-turbidity conditions.
- Municipal Sewage and Industrial Wastewater
- COD, BOD and SS removal in municipal wastewater treatment plants.
- Treatment of papermaking, textile printing & dyeing, electroplating, mining and chemical wastewater.
- Used in primary coagulation, tertiary polishing and phosphorus removal sections.
- Sludge Dehydration and Phosphorus Removal
- Enhances sludge dewatering performance when used with polymer flocculants.
- Effective precipitation of phosphate, suitable for total phosphorus control in effluent.
- Industrial Circulating Water and Desalination Pretreatment
- Pretreatment of cooling water and seawater/brackish water desalination systems.
- Reduces fouling and turbidity load on downstream equipment and membranes.
- Other Fields
- Beneficiation and tailing clarification in mining.
- Clarification of food and beverage processing effluents (where allowed by local regulations).
If you share your raw water analysis report (turbidity, COD, pH, alkalinity, etc.), we can recommend the most suitable grade and dosage range.
Storage Conditions
- Storage temperature: Preferably 5 – 30 °C. Avoid freezing and long-term exposure to high temperature.
- Environment: Keep in a cool, dry, well-ventilated warehouse, protected from direct sunlight and rain.
- Packaging integrity: Keep bags or IBC tanks tightly closed when not in use to prevent moisture absorption (solid) or concentration change (liquid).
- Shelf life:
- Solid: typically 12 – 24 months under recommended storage conditions.
- Liquid: typically 6 – 12 months; slight precipitation during storage can usually be redissolved by stirring and does not affect normal use if main indexes remain qualified.
- Stacking: Avoid excessive stacking height for bagged products to prevent caking and packaging damage.
Safety Precautions
- Polyferric Sulfate is acidic and may cause irritation to eyes, skin and respiratory tract.
- Avoid direct contact. Wear appropriate protective gloves, goggles and work clothing when handling.
- In case of skin contact, wash immediately with plenty of water and soap.
- If it gets into the eyes, rinse with clean water for at least 15 minutes and seek medical attention if irritation persists.
- Avoid inhalation of dust or mist. Provide local ventilation or general exhaust in working areas.
- Do not eat, drink or smoke while handling the product; wash hands thoroughly after operation.
- Spillage should be collected and reused if possible. Rinse remaining residues with plenty of water into the treatment system; do not discharge directly into natural water bodies without treatment.
- For detailed information, please follow your local regulations and refer to the product SDS.
FAQ - Technical & Supply Chain
-
Q:
What is Polyferric Sulfate CAS 10028-22-5?
A: Polyferric sulfate, commonly called PFS, is a polymeric iron-based coagulant supplied as a brownish-yellow powder, granular solid or liquid. It is used to remove suspended solids, turbidity, color and phosphorus from water and wastewater. -
Q:
How does PFS differ from ordinary ferric sulfate or aluminum coagulants?
A: PFS contains pre-polymerized ferric species that provide stronger charge neutralization and bridging. It typically forms larger, denser flocs, can be effective over a wider pH range, and often requires a lower dosage than conventional coagulants. -
Q:
Does PFS work in low-temperature or low-turbidity water?
A: Yes. Compared with some aluminum-based coagulants, PFS generally maintains faster hydrolysis and better coagulation in cold water and in low-turbidity or high-color conditions, although jar testing should still confirm the optimum dose. -
Q:
What are the main applications?
A: It is used in drinking-water clarification, municipal sewage treatment, industrial wastewater treatment, phosphorus removal, sludge dewatering, textile and dyeing wastewater, papermaking wastewater and other coagulation applications. -
Q:
Which grade and packaging are available?
A: The listing is industrial/water-treatment grade. Solid PFS is supplied in 25 kg or 50 kg PP woven bags with an inner PE liner, while liquid grades are available in 1,000 L IBCs or bulk tanks, with customization available. -
Q:
What specifications should be checked before ordering?
A: Confirm physical form, total iron, basicity, pH, water-insoluble matter, reducing substances and heavy metals such as arsenic, lead and cadmium. Request the current batch analysis, technical data and safety information before purchase. -
Q:
How should PFS be stored and handled?
A: Store solid material in tightly closed bags in a dry, ventilated area away from moisture, alkalis and incompatible materials. PFS solutions are acidic and corrosive, so use corrosion-resistant dosing equipment, chemical-resistant PPE and eye protection, and follow the safety information.
Ordering & Documentation
Key information for document requests, quotations, and supply planning.
Documents
COA, TDS, SDS/MSDS and packing details are available on request.
Quotation
Send the CAS number, grade, quantity, packing preference and destination.
Sample & Supply
Support is available for samples, trial orders, bulk and repeat supply.
Storage & Shipping
Product-specific conditions are confirmed before order.
