What is Potassium peroxymonosulfate？
Potassium peroxymonosulfate (CAS 70693-62-8) is an inorganic compound with the chemical formula 2KHSO₅·KHSO4·K2SO4, a member of the persulfate family. It usually exists in the form of a complex salt (such as a mixture with potassium hydrogen sulfate and potassium sulfate). It has a powerful and effective nonchlorine oxidation ability, and its use and processing meet safety and environmental requirements, making it widely used in industrial production and consumption fields. Under normal conditions, it is relatively stable, but decomposition reactions are prone to occur when the temperature exceeds 65 ℃. It is lively and easy to participate in various chemical reactions and can be used as an oxidant, bleach, catalyst, disinfectant, etchant, etc.
How Potassium peroxymonosulfate works
The molecular formula of potassium monopersulfate composite salt is 2KHSO₅·KHSO4·K2SO4, among which potassium monopersulfate (KHSO5) plays an effective role. This substance is easily activated when it comes into contact with water, and hydrolysis produces sulfate radicals (SO4-), hydroxyl radicals (OH), and new ecological oxygen (O).
The reaction formula for potassium monopersulfate is as follows:
KHSO5 →HSO5- + K+HSO4- + [O] +K+
2 HSO5-→2•SO4-+ H2O2
SO4-• + H2O→ SO42-+ •OH + H+
HSO5-→HSO4-+ [O]
HSO4-+ H2O→HSO5-+ 2H++2e+
HSO5-→•SO4-+ •OH
In the presence of organic matter, the following reaction formula may occur:
SO4-• + RH → •R + HSO4-
•OH + RH →•R + H2O
•R + SO52- → •SO4-+ •O + R
In the above reaction formula, RH is an organic compound; R is a small molecular group.
According to the reaction equation, potassium monopersulfate contains three oxidizing substances, which are interrelated and derived from each other. At the end of the reaction, there is only a small amount of K+, SO, and partially oxidized functional groups in the system, so this agent does not produce toxic intermediate by-products.
The use of Potassium peroxymonosulfate
1. Water treatment
PMS is a powerful nonchlorine oxidant that can degrade and remove various pollutants. Due to its excellent environmental characteristics, ease of use and transportation, safe handling, and good stability, it has become an attractive choice for water treatment applications.
Compounds that can be oxidized/neutralized by PMS include:
Ammonia and amine compounds;
- Nitrite;
- Aldehydes;
- Organic amines:
- Organic sulfides:
- Quinoline class;
- Cyanides and thiocyanates;
- Hydrogen sulfide and organic sulfides, etc.
2. Papermaking
PMS can be used as a processing aid for re-pulping or secondary fiber blending, thereby improving production efficiency. PMS can oxidize polyamine epichlorohydrin (PAE) in pulp manufacturing without damaging pulp fibers, and has the following advantages in the papermaking field:
- Free of chlorinated (AOX) compounds
- Efficient re-pulping
- High fiber yield improves productivity
- No stainless steel corrosion
- Simpler and safer operation
- Green Seal Verification
- Reduce dependence on native fibers
3. Denture cleaner
PMS is a highly effective nonchlorine oxidant and has long been the main component in denture cleaning agents.
The advantages of using PMS in denture cleaning agents:
- As a stable powder product, it is easy to formulate into granular and tablet combinations.
- Has strong oxidation performance,
- It can effectively control bacteria,
- Excellent water solubility, easy to rinse
- No odor.
- Compared to other oxidants, it has a faster effect, which means a shorter soaking time.
- Excellent compatibility with denture materials
- GRAS oxidation byproduct certification is recognized as safe
4. Electronic product
PMS is a free-flowing powder chemical etchant used for copper cleaning and surface treatment in printed circuit board manufacturing. KHSO5, as an active ingredient, can provide more effective copper oxidation. Compared with noncompetitive products such as hydrogen peroxide/sulfuric acid and sodium persulfate (SPS), this chemical substance can provide better etched copper surface morphology and has a clear grain structure with uniform distribution. The optimized grain structure generated by PMS chemistry provides better adhesion for metal plating, dry film, final finish, and IC packaging.
The advantages of PMS application in the field of electronic products are:
- Free-flowing powder is uniform
- Predictable etching rate
- High etching rate
- Long bath life
- Excellent bonding morphology
- High copper load
- No stabilizer required
- Good rinsing performance
5. Odor control
Many industries encounter odor problems caused by wastewater. Worker safety, odor complaints, stricter wastewater discharge and air emission restrictions are all driving the development towards effective odor control. PMS is highly effective in controlling harmful and irritating odors, providing a powerful, selective, effective, kinetic, and irreversible oxidation of odor compounds.
The high redox potential and rapid reaction kinetics of PMS enable it to react rapidly with volatile organic compounds (VOCs), including hydrogen sulfide/organic sulfide/disulfide/thiol/organic amine/quinoline/aldehyde/ketone/synthetic fragrance.
Suitable for breweries, chemical plants, food processing, home and personal care industries, industrial and municipal wastewater treatment plants, oil and gas refineries, textile mills, and pulp and paper mills.
6. Swimming Pool and Spa Water Purification
The water in swimming pools and spas should be kept clear and odorless. PMS can be used as an oxidant to maintain transparency by oxidizing organic pollutants such as sweat, urine, skin debris, etc. After oxidation, pollutant particles are more likely to aggregate into larger particles, which can be filtered and removed by the swimming pool.
Regular use of PMS products helps to remove organic pollutants before they react with chlorine to form chloramines. Simply disperse PMS products into the water of the swimming pool and let the water circulate for 15 minutes to achieve the effect of purifying the water.
7. Disinfection field
Mechanism of action of PMS disinfectant:
PMS, after dissolving in water, releases various active ingredients with high oxidation-reduction potentials, such as new ecological oxygen [O], sulfate radicals, hydroxyl radicals, hydrogen peroxide radicals, etc., through chain reactions, which interfere with the synthesis of DNA and RNA of pathogens, cause protein coagulation and denaturation of pathogens, thereby interfering with the activity of pathogen enzyme systems, affecting their metabolism, increasing the permeability of cell membranes, causing enzyme and nutrient loss, pathogen dissolution and rupture, and ultimately killing pathogens.
The safety and environmental protection of Potassium hydrogenperoxomonosulphate
The use and processing of potassium hydroperoxonosulphate comply with safety and environmental requirements, making it an environmentally friendly disinfectant. Its aqueous solution is acidic, very suitable for disinfecting various water bodies, and does not produce toxic side effects, with almost no damage to aquaculture. Suitable for various disinfection and cleaning applications, especially in the fields of aquaculture and livestock breeding, it has significant effects.
Where to buy potassium peroxymonosulfate?
Runtai Chemical is a professional and reliable China manufacturer of Potassium peroxymonosulfate with higher purity and lower price for 15 years. If you are interested in our Potassium peroxymonosulfate, feel free to contact us for free samples!
