
What is potassium monopersulfate used for?
Potassium Monopersulfate (monopersulfate, KMPS or MPS) is a white, granular, free-flowing peroxygen that provides powerful non-chlorine oxidation for a wide variety of uses. It is the active ingredient in most nonchlorine oxidizers used for pool and spa/hot tub oxidation.
Is monopersulfate good for swimming pools?
Here’s the good about monopersulfate… Contains no chlorine, so it doesn’t produce combined chlorine. Has no odor and doesn’t cause irritation. Doesn’t require premixing and dissolves fast in normal pool water temperatures (78°F–82°F). Simple to use — an oxidizing dose is 2 lbs./10,000 gallons. Can be used in chlorine and bromine environments.
Is monopersulfate a non-chlorine shock?
Now, I’m going to be very picky here, monopersulfate is NOT a non-chlorine “shock” since shock infers killing something, and monopersulfate doesn’t kill.
Is monopersulfate a solid liquid or gas?
Potassium monopersulfate is a dry solid with strong oxidizing properties. It is very stable when stored in a cool, dry, ventilated area and not contaminated by other chemicals such as alkalis or easily oxidizable materials. Monopersulfate should not be mixed with other pool chemicals.

What is monopersulfate used for?
The role of monopersulfate is to provide effective non-chlorine oxidation — in other words, to react with organic contaminants and maintain or restore water clarity. Non-chlorine oxidizers, like similar chlorine products, are intended to be used for supplemental treatment.
What does potassium monopersulfate do in a pool?
Potassium monopersulfate is a powerful oxidizer with several attractive properties (see last section). Properly applied, it will prevent the formation of new combined chlorine by eliminating organics in the water without creating more combined chlorine.
Can potassium monopersulfate be used with chlorine?
Pool professionals use potassium monopersulfate (KMPS or MPS) as a non-chlorine shock. It is compatible with chlorine pools and bromine pools, but not cost effective for long-term use.
Does potassium monopersulfate raise pH in pool?
Furthermore, it lowers the pH and the total alkalinity. KMPS shows up as combined chlorine in the DPD test and as free chlorine in the FAS-DPD test. It oxidizes and reacts with one of the reagents. This interference can be removed, however, and service technicians should be aware of this point.
How do I increase Monopersulfate in my hot tub?
Shocking the water with chlorine will eliminate excessive chloramines, but it requires raising the spa chlorine level to approximately 10 ppm. After super-chlorinating the water, bathers must wait until the chlorine residual comes down to the acceptable range, between 1 ppm and 5 ppm, before getting back in the water.
Is potassium monopersulfate toxic?
Acute Toxicity: This product is corrosive to all tissues contacted and upon inhalation, may cause irritation to mucous membranes and respiratory tract.
What can I use instead of spa shock?
Many people have switched to alternative purification systems such as Cleanwater Blue or Nature2 to get away from chlorine. It is still a good idea to start these systems with a dose of dichlor. Shocking with dichlor ensures a clean start and will help curb problems from pre-existing contaminants.
What is the difference between chlorine and non-chlorine shock?
Chlorinated shocks have a pH closer to household cleaners. Because chlorine-free shocks have a lower pH than their chlorinated counterparts, swimming can resume just 15 minutes after the shock it added. It also will not bleach out pool liners, paint, or your swim trunks.
Does oxidizing shock raise pH?
Both an oxidizer and sanitizer, cal hypo is quick dissolving and is the most frequently used in the pool industry. It will slightly raise your pH, so make sure you adjust pH while using it. As the name implies, it will also raise your calcium hardness levels in your pool slightly.
Can I just use shock instead of chlorine?
SKIMMER NOTES: No. Chlorine and shock are not the same thing. Shock has a more intense chemical strength than the traditional chlorine sanitizers, and it also differs in how you should apply it to your swimming pool. Short answer: No.
Is shock and chlorine the same thing?
Chlorine is a sanitizer, and (unless you use Baquacil products) is necessary for maintaining a clear and healthy pool. Shock is chlorine, in a high dose, meant to shock your pool and raise the chlorine level quickly.
Can you add too much non chlorine shock?
If too much is added, it can cause the overall pH level of the pool to drop for a sustained period, which you'll then have to raise. Whereas, with a chlorinated shock, if you overdose the pool on it, all you have to do is wait a few extra hours for the sun to burn off the chlorine.
What is potassium peroxymonosulfate used for?
Like peracetic acid, potassium peroxymonosulfate is an oxidizing agent, and 1% solutions are high-level disinfectants that are capable of inactivation of non-enveloped viruses when contact times of 10 minutes are used. Thus it is suitable for inactivation of canine parvovirus and feline calicivirus.
Is potassium Peroxymonosulfate the same as potassium monopersulfate?
Potassium Peroxymonosulfate is also called Potassium Monopersulfate and MPS, different names for the same stuff.
How do you make potassium monopersulfate?
Potassium peroxymonosulfate can be prepared by reacting a concentrated solution of Caro's acid with a potassium salt, such as potassium carbonate. Potassium hydroxide can also be used. It can also be obtained via electrolysis of potassium persulfate in sulfuric acid.
What is the difference between chlorine and non chlorine shock?
Chlorinated shocks have a pH closer to household cleaners. Because chlorine-free shocks have a lower pH than their chlorinated counterparts, swimming can resume just 15 minutes after the shock it added. It also will not bleach out pool liners, paint, or your swim trunks.
What is potassium monopersulfate?
Potassium Monopersulfate (monopersulfate, KMPS or MPS) is a white, granular, free-flowing peroxygen that provides powerful non-chlorine oxidation for a wide variety of uses. It is the active ingredient in most nonchlorine oxidizers used for pool and spa/hot tub oxidation.
When to add monopersulfate?
Add monopersulfate in the evening and test the following morning
What is the safety information for potassium monopersulfate?
Safety information is available on the product label, safety data sheet and the manufacturer’s product literature. This safety information will include product and packaging disposal instructions and spill response information.
Can you use potassium monopersulfate in a hot tub?
Potassium monopersulfate is compatible with all sanitizer products and systems. When used with biguanide systems, follow the biguanide manufacturers’ specific recommendations for the use of potassium monopersulfate.
Is potassium monopersulfate a sanitizer?
Potassium monopersulfate is not a sanitizer or algaecide and must be used in conjunction with an EPA-registered sanitizer. The role of monopersulfate is to provide effective non-chlorine oxidation — in other words, to react with organic contaminants and maintain or restore water clarity.
Does potassium monopersulfate help with chloramines?
Regular oxidation with potassium monopersulfate will help manage combined chlorine levels and problems associated with chloramines.
What is monopersulfate in a spa?
Monopersulfate is a non-chlorine shock treatment that has become very popular with hot tub and spa owners and requires only a short waiting period before soakers and bathers can re-enter the water. It also cuts down on the odors and irritation caused by elevated levels of chlorine. With the rising popularity of mineral purification systems, ...
What is potassium monopersulfate?
Potassium Monopersulfate from Dupont. The use of Potassium Monopersulfate, a non-chlorine shock treatment , has significantly increased in both use and popularity among hot tub and spa owners over the last 10 years.
What is the best sanitizer for a hot tub?
Another popular choice for sanitation in hot tubs and spas is bromine. Bromine is a good alternative to chlorine because it’s more stable in hot water, doesn’t produce the same strong chlorine odor and is still an effective sanitizer.
How long does it take for a bath to return to water after a monopersulfate shock?
This allows soakers and bathers to return to the water much sooner than with chlorine shock, typically less than 30 minutes after the monopersulfate shock has been added to the water. Monopersulfate eliminates impurities through oxidation, while conserving the chlorine residual for killing bacteria.
What is the effect of chlorine oxidation on spa water?
Chloramines have a very strong chlorine odor, and they cause nasal and eye irritation. Shocking the water with chlorine will eliminate excessive chloramines, but it requires raising the spa chlorine level to approximately 10 ppm.
Why use MPS in spa?
When used at full strength, many hot tub and spa owners refer to MPS as the Non-Chlorine or Non-Bromine “Shock Treatment Alternative” because of its effectiveness to destroy and remove contaminants and bacteria.
Can you use monopersulfate with chlorine?
Using Monopersulfate With Chlorine. Monopersulfate can eliminate wastes in hot tubs and spas without the unpleasant side effects of chlorine. While it cannot effectively sanitize or kill all bacteria in a hot tub or spa, monopersulfate can effectively be used to shock the water.
What is a monopersulfate?
Monopersulfate (MPS or Non-Clorine Shock) is an Oxidizer. In a Spa sanatized with Clorine, tests for MPS levels are not accurate, you must subtract the Clorine effect from the test.
Why do you need to test for monopersulfate?
Monopersulfate needs to be measured after each use. This ensures proper oxidation of wastes , yielding clear water for bather enjoyment. There are few kits available to test for monopersulfate. Almost all testing methods have chlorine interference, meaning that the chlorine level interferes with the monopersulfate test results. These tests actually depend on oxidation of an indicator by monopersulfate. Since chlorine is also a strong oxidizer, it usually causes false positive results in monopersulfate tests.
What is potassium monopersulfate?
The Beauty of Potassium Monopersulfate. There are some who have turned to potassium monopersulfate ( KMPS or MPS) as a means for shocking their pools. KMPS is a non-chlorine oxidizer, whose chemical formula is KHSO5. It is a strong oxidant with an oxidation potential of similar magnitude to that of chlorine.
Why is KMPS used in shock pools?
“KMPS is used to shock pools for a variety of reasons. Some use it to avoid using chlorine. ”. When chlorine is used to oxidize pool water, it reacts with bather and other organic wastes, which are primarily nitrogen based compounds, ...
Does potassium monopersulfate oxidize chloramines?
Potassium Monopersulfate. oxidizes chloramines as well as urea, the active ingredient in urine, according to John Wojtowitc, water chemist. It reacts very slowly with ammonia. KMPS’s lifetime in pool water depends on the quantity of oxidizable material.
Is KMPS a sanitizer?
For all its limitations, KMPS does have its uses. The most important point to remember is that while it is certainly a strong oxidant, it is NOT a sanitizer, and therefore provides no protection against bacteria and viruses. Return to Blog Home • E-Z Test Pool Supplies. #pool sanitation. #OnGuard Scorch Plus.
Does KMPS work with chlorine?
Also, it dissolves quickly, and does not fade liners. It works well with chlorine, arguably allowing chlorine to work more efficiently as a sanitizer. Using KMPS is highly recommended for indoor pools, where there is no sunlight or wind to help break down and carry away combined chlorine.
What is Shock Treatment?
Shocking a spa means applying an ample dose of chlorine (sodium dichlor) or non-chlorine shock (potassium monopersulfate or MPS). One purpose of this treatment is to break-down organic waste contaminants which cause odor and cloudy water. After treatment, water quality and clarity is often completely restored.
Non-Chlorine Shock - regular use for maintenance
Non-chlorine shock is monopersulfate compound, often called MPS for short. It is an oxygen-based shock, preferred by many because it has little or no odor.
Dichlor Shock - occasional use to clear up problems
Dichlor shock is a form of chlorine often called sodium dichlor. Technically it's both a sanitizer and a shock, although we do not recommend chlorine as a primary sanitizer in spas.
When to Shock
It is a good practice to shock with dichlor when you refill your spa. After that, regular maintenance can normally be accomplished with non-chlorine shock.
With Alternative Water Purifiers
Many people have switched to alternative purification systems such as Cleanwater Blue or Nature2 to get away from chlorine. It is still a good idea to start these systems with a dose of dichlor.
Dosages
The amount of shock to use will depend on the bather load, and which water sanitization system you have chosen. Refer to our Preparation & Maintenance Guide and read all product package directions for more information.
Sportbikenut
Does anyone know if Potassium Monopersulfate (MPS)is similar or same to Sodium Persulfate? Both are listed as oxidizers. Thanks!
chem geek
Interests:Interested in pool water chemistry. Undergrad degree in physics/chemistry. MBA. Other interests include swimming, skiing, genealogy.
kstuder
They are both oxidizers, but are not the same. The active part of the potassium monopersulfate (aka peroxymonosulfate) is the HSO 5- ion while with sodium persulfate (aka peroxydisulfate) it is the S 2 O 82- ion.
simonc
Sodium persulfate (sodium peroxydisulfate) (Na 2 S 2 O 8) would be essentially equivalent to potassium persulfate (potassium peroxydisulfate). I don't think either it is sold for, or suitable for, pool or spa use.
waterbear
Sodium persulfate (sodium peroxydisulfate) (Na 2 S 2 O 8) would be essentially equivalent to potassium persulfate (potassium peroxydisulfate). I don't think either it is sold for, or suitable for, pool or spa use.
quantumchromodynamics
Sodium Persulfate is sold by Kem-Tek as a non-chlorine shock. See the link to their website. Also, here is a link to the MSDS for the product.
