Potassium Monopersulfate Compound

Potassium Monopersulfate Compound (CAS 70693-62-8)

Basic Information:

Appearance:White powder or granule

Content:≧99%

Active component%:≧42%

%Available oxygen:≧4.5%

PH(10g/L,25℃):2.0-2.3

Potassium Monopersulfate Compound, registered under CAS number 70693-62-8 and often known by its trade name Oxone®, is a versatile and powerful oxidizing agent. It is critically important to understand that it is not a single pure compound but rather a triple salt formulated for stability and safety. Its precise composition is 2KHSO5.KHSO4.K2SO4. The active oxidizing component is potassium peroxymonosulfate (KHSO₅), which makes up approximately 42.8% of the mixture. The remaining components, potassium hydrogen sulfate (KHSO₄) and potassium sulfate (K₂SO₄), act as stabilizers.

This compound presents as a white, free-flowing granular or powdered solid. It is highly soluble in water, and a 1% aqueous solution is strongly acidic, typically with a pH between 2.3 and 2.5. Its most significant property is its powerful oxidizing capacity, with a standard redox potential of +1.82 V for the KHSO₅ component. This makes it a stronger oxidizer than hydrogen peroxide or potassium permanganate.

Its mechanism of action is twofold. Firstly, the KHSO₅ molecule acts as a direct oxidant, breaking down organic and inorganic materials. Secondly, particularly in water and when activated, it can generate highly reactive free radicals, primarily sulfate radicals (SO₄·⁻), which greatly enhance its efficacy against resilient contaminants and pathogens.

Applications:

In Water Treatment and Aquaculture, its primary use, it serves as a multi-functional tool. It acts as a broad-spectrum disinfectant against bacteria, viruses, and fungi; oxidizes organic waste and sludge on pond bottoms; detoxifies harmful compounds like ammonia, nitrites, and hydrogen sulfide; and even provides a source of supplemental oxygen through its decomposition.

In Industrial and Chemical Synthesis, it is valued as a "green" oxidizing agent. It facilitates various selective oxidation reactions in organic chemistry, offering a safer and more environmentally friendly alternative to heavy metal-based oxidants. It is also used in the electronics industry as an etchant for copper printed circuit boards.

As a Bleaching Agent, it is employed in the textile and pulp industries for gentle bleaching. It is also a key component in professional hair lightening products and certain laundry detergents.

For Disinfection and Cleaning, it is formulated into surface disinfectants effective against a wide range of pathogens, including viruses like norovirus and coronaviruses. It is also found in products for denture cleaning and swimming pool shock treatment.

The advantages of this compound are significant. It is highly effective yet decomposes into benign residues—primarily potassium sulfate, oxygen, and water—making it an environmentally preferable choice. The triple salt formulation ensures good stability for storage and handling, and it is available in user-friendly forms like tablets.

Safety:

Safe handling is paramount due to its inherent hazards. The compound is corrosive and can cause severe skin burns and eye damage. As a strong oxidizer, it poses a serious fire and explosion risk if it comes into contact with combustible materials, other oxidizers, or reducing agents. Critical incompatibilities include chlorine-based products (e.g., bleach), as toxic chlorine gas can be produced, and ammonia or ammonium salts, which can form explosive compounds. Appropriate personal protective equipment (PPE), including gloves, safety glasses, and protective clothing, is mandatory when handling this material.

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