Potassium persulphate (K2S2O8, CAS: 7727-21-1) is a powerful inorganic oxidizing agent with wide usage across the chemical industry, environmental treatment, electronics, polymerization, and metallurgy. With increased demand for high-purity initiators, potassium persulphate (also referred to as potasium persulphate) showcases technical advantages in initiation efficiency, storage stability, and environmental performance.
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Potassium persulphate by Fizachem
1. Industry Overview & Trends
The potassium persulphate market exhibits a steady CAGR of 4.5% from 2020-2027, driven by rapid expansion in electronics etching, polymerization initiators, water treatment, pulp & paper bleaching. Main global producers are concentrated in China, Japan, and Europe.
Global Market Share (%), Major Producers (2023)
Region |
Key Producer |
Market Share |
Production Capacity (MT/year) |
China |
Fizachem, United Initiators |
~48% |
31,000 |
Japan |
PeroxyChem, Adeka |
~16% |
8,500 |
Europe |
MGC, Persulfates Europe GmbH |
~28% |
16,300 |
Others |
Niche Manufacturers |
~8% |
4,800 |
* Source: MarketsandMarkets, Kline & Co., 2023 Persulfates Industry Report

Potassium persulphate crystal morphology
2. Technical Specification & Industry Standards
Below is a technical data summary according to latest potassium persulphate SDS (Safety Data Sheet) and producer certificates (ISO 9001:2015, REACH, RoHS). This standardization ensures consistency and safety for all applications.
Potassium Persulphate — Typical Technical Specifications
Parameter |
Value (Industrial Grade) |
Value (High Purity) |
Test Method / Standard |
Appearance |
White crystalline powder |
White crystalline powder |
Visual Inspection, ISO 8213 |
Assay (K2S2O8, %) |
≥ 99.0 |
≥ 99.5 |
ISO 6353/3 |
Chloride (Cl, %) |
≤ 0.02 |
≤ 0.005 |
ISO 2488 |
Moisture (%) |
≤ 0.10 |
≤ 0.05 |
ISO 760 (Karl Fischer) |
Iron (Fe, ppm) |
≤ 20 |
≤ 5 |
ICP-OES, ISO 11885 |
pH (5% solution) |
~4.0 |
~4.0 |
ASTM D1293 |
Decomposition temp, °C |
~100 |
~100 |
DSC/ISO 11357 |
Bulk density (g/l) |
700 - 900 |
700 - 900 |
ISO 697 |
Note: Values are typical and may vary based on supplier batch. Always refer to potassium persulfate SDS for precise safety handling and regulatory info.
3. Manufacturing Process of Potassium Persulphate
K2SO4
Potassium Sulphate
Raw Material
➜
H2SO4
Sulfuric Acid
Electrolyte
➜
Electrolysis (Electrochemical Cell)
Controlled voltage, platinum anode
➜
K2S2O8
Potassium Persulphate
Crystallization, Filtration, Drying
Key manufacturing standards strictly adhered to: ISO 9001, ISO 14001, and ANSI/ASTM chemical test methods.
Critical steps:
1) Selection of high-purity K2SO4 and acid; 2) Use of platinum for electrode stability;
3) Precise current, temperature, and cooling control;
4) Multi-stage crystallization and vacuum drying
4. Technology Advantages of Potassium Persulphate

Major potassium persulphate applications
Material Features & Manufacturing Quality
- Oxidizing Power: Persulfate anion (S2O82−) has a redox potential of +2.1 V, much higher than peroxides or ozone.
- Inert towards Most Organics: Ensures low undesired side reactions in polymerization and etching.
- Corrosion Resistance: Stable in sealed, dry storage; packaged in anti-UV HDPE drums (potassium persulphate SDS specification).
- High Reactivity, Low Residue: Complete decomposition yields harmless sulfate ions (environment-friendly).
- Long Shelf Life: ≥ 24 months under ISO/ASTM tested packaging, moisture
- Certified Quality: Every batch meets REACH, RoHS, and ISO 9001 certification.
Chemical & Physical Parameters Comparison
KEY TAKEAWAY: Choose potassium persulphate for polymerization where ion contamination from sodium/ammonium must be minimized (e.g., electronics).
5. Application Scenarios & Case Studies
Main Applications of Potassium Persulphate
Industry |
Application Type |
Typical Dosage (g/L) |
Effect/Advantage |
Polymer Manufacturing |
Polymerization initiator (latex, acrylics, SBR) |
1-3 |
High conversion, low odor, pure end product |
Electronics |
Micro-etching, PCB cleaning |
10-15 |
Uniform copper removal, residue-free |
Environmental Remediation |
In situ chemical oxidation (ISCO) |
25-40 |
Destroys organic pollutants, nitrate-free |
Textiles |
Desizing, bleaching |
2-4 |
Bright white finish, mild on fabric |
Mining/Metallurgy |
Ore flotation, gold leaching |
2-8 |
Selective oxidation, residue control |
Case Example: PCB Manufacturer — Application of Potassium Persulphate
Background: A leading printed circuit board (PCB) manufacturer in Taiwan faced issues with inconsistent etching and copper residue.
Solution: Switched to high-purity potassium persulphate supplied by Fizachem, supported by ISO 9001-compliant technical training.
Result: Achieved >98.5% process yield, reduced copper wastage by 23%, and met RoHS and REACH compliance.
6. Product Comparison Table
Comparison of Major Persulphate Salts
Property |
Potassium Persulphate |
Ammonium Persulphate |
Sodium Persulphate |
Molecular Formula |
K2S2O8 |
(NH4)2S2O8 |
Na2S2O8 |
Molecular Weight |
270.32 |
228.20 |
238.11 |
Solubility (g/100mL, 20°C) |
4.7 |
8.0 |
54.0 |
Initial Decomp. Temp (°C) |
100 |
120 |
80 |
Common Application |
Electronics, Latex |
Polymerization, Bleaching |
Cleaning, Soil Remediation |
Typical Residue |
K+ |
NH4+ |
Na+ |
ISO Compliance |
ISO 9001, ISO 14001 |
ISO 9001 |
ISO 9001 |
7. Customization & Delivery (Fizachem)
- Package options: 1kg, 10kg, 25kg HDPE drums, 1200kg IBCs, moisture-protected bags (per potassium persulphate SDS & international shipping).
- Purity grades: 99.0%, 99.5%, 99.8% (electronics), food grade on request (ISO 22000/2018, FDA for food-processing aids).
- Specifications on request: Particle size, pH value, trace impurity control, customized drum labelling/barcoding.
- Lead Time: 7-14 days upon confirmation; urgent air express available.
- OEM/Private label available for global traders (custom documentation, REACH/IMDG MSDS issued).
- Warranty: 24 months from shipment; batch testing available on request.
- Support: 24/7 technical hotline, SDS/RoHS download, supply chain tracking.
8. Customer Experiences & EEAT (Expertise, Experience, Authority, Trustworthiness)
- Long-term clients: China Petrochemical, Sumitomo Chemicals, BASF Electronics, Taiwan PCB Group.
- Academic endorsement: Referenced in leading journals in SAGE – Journal of Hazardous Substances and ACS – Industrial & Engineering Chemistry.
- ISO, REACH, RoHS Certified: Annual audits by SGS/TÜV, batch traceability system compliant with FDA 21 CFR Part 11.
- Feedback: “Since deploying potassium persulphate from Fizachem, our SBR latex lines have seen a 14% throughput improvement and reduced rejection rates.” – Client, Top 3 Polymer Producer, 2023.
- Safety: All shipments with up-to-date potassium persulfate SDS, UN class coded, and globally accepted labelling.
9. FAQ: Potassium Persulphate Industry Terms & Technical FAQ
Frequently Asked Questions
-
Q1: What is the primary industry-standard for potassium persulphate quality?
A: ISO 8213/ISO 9001 and REACH compliance are mandatory for leading manufacturers. Customers should always request confirmation of batch traceability and certificate of analysis (COA) for every lot.
-
Q2: Are there residue or corrosion issues when using potassium persulphate in electronics?
A: Potassium ion residues are much less aggressive than sodium or ammonium. With proper rinsing per potassium persulfate SDS, no conductive/corrosive issues occur on finished PCBs.
-
Q3: Which packing is recommended for moisture-sensitive projects?
A: Double-layer HDPE drums with foil sealing or nitrogen-filled bags as per ASTM E104 (moisture less than 0.05%).
-
Q4: How does potassium persulphate compare to ammonium persulphate for polymerization processes?
A: Potassium persulphate offers higher purity, lower ammonium contamination, and is preferable for high-transparency or low haze latex/PSA production.
-
Q5: What are the typical shelf-life and recommended storage?
A: At 25°C and < 60% RH, sealed packaging, the shelf life is ≥24 months (ISO 11607-1 validated), provided no cross-contamination with organic matter.
-
Q6: Is there special disposal procedure for potassium persulphate?
A: Follow national hazardous waste directive 91/689/EEC; neutralize with sodium bisulfite, then excess sulfate can be safely managed by regulated incineration or dilution.
-
Q7: Can potassium persulphate be customized for ultra-high purity microelectronic use?
A: Yes, with impurity (Fe, Cl) ≤1 ppm, certified according to SEMI C78 specs for microelectronics, and batch-validated by ICP-OES.
10. Delivery, Warranty & Support
11. References & Further Reading