Potassium Permanganate

Remediation-Grade Potassium Permanganate

We’ve supplied potassium permanganate to remediation consultants for three decades, and the questions haven’t changed much: how pure is it, how do I get it to 5%, and can you deliver it already mixed. This page answers all three, with the numbers.

Hepure’s potassium permanganate is a remediation-grade chemical oxidant used in groundwater treatment, soil remediation, and industrial water systems. Delivered as a dry crystalline powder at >97% purity, it is the cost-effective permanganate option for in situ chemical oxidation (ISCO), soil blending, and water treatment — and independent lab testing consistently confirms it is among the purest products available on the market. Comparing forms? See permanganate for ISCO for how it pairs with our 40% sodium permanganate liquid.

Product Specifications

Download the Safety Data Sheet (SDS)

How Potassium Permanganate Is Used in Remediation

Potassium permanganate is delivered as a dry powder and mixed with water on site to create solutions of up to 5% concentration for injection or application. For larger projects, Hepure can blend and deliver pre-mixed solutions directly to your site — eliminating on-site mixing and reducing health and safety exposure for field crews. Ask about site-ready solutions when you request a quote.

One design note from the calls we take: the most common miss is underestimating soil oxidant demand. The formation consumes permanganate before the contaminant ever sees it, and an order sized to the contaminant alone comes up short. Run your site data through our permanganate demand calculator before you size the order — or send it to us and we’ll run it with you.

Key handling characteristics that make potassium permanganate well suited to remediation work:

• pH neutral in solution — does not alter groundwater pH during treatment
• No gas release or heat generation — reacts with contaminants without producing dangerous byproducts
• Backfill-compatible — can be added to excavation pits before backfilling to treat groundwater flowing into the excavated area
• Flexible delivery — dry crystals for on-site mixing, or pre-mixed solution up to 5%

Potassium Permanganate for Soil Remediation

Potassium permanganate is one of the most widely used oxidants for treating contaminated soil. Its solid form makes it especially effective for soil blending and direct application. See our soil remediation guide for how it fits alongside other technologies.

Chlorinated Solvent Oxidation

KMnO4 oxidizes a wide range of organic compounds, including chlorinated solvents such as trichloroethylene (TCE), perchloroethylene (PCE), dichloroethylene (DCE), polycyclic aromatic hydrocarbons (PAHs), and certain pesticides. Upon oxidation, these complex organic compounds break down into smaller, less harmful substances.

In Situ Chemical Oxidation (ISCO)

In ISCO applications, potassium permanganate solution is injected directly into the contaminated subsurface, where it reacts with target contaminants in place — treating both soil and groundwater without excavation. It is particularly well suited to sites where lower-concentration delivery (≤5%) is acceptable and cost control is a priority. For the full oxidant lineup, see chemical oxidants for ISCO.

Metals Immobilization

While not its primary application, potassium permanganate can transform certain heavy metals in soil into less mobile or less toxic forms, limiting their ability to leach into groundwater or be taken up by plants.

Soil Odor Control

KMnO4 is effective at controlling odors in contaminated soils, especially those caused by reduced sulfur compounds, by oxidizing them into odorless forms.

Potassium Permanganate for Water Treatment

Outside remediation, potassium permanganate earns its keep as a water treatment oxidant. It turns dissolved iron, manganese, and sulfide into solids a filter or clarifier can remove, and it oxidizes phenols and many odor-causing compounds. It stays active long enough to finish the job in a contact basin, and it shows its own residual: the water stays pink until the demand is met.

Drinking Water

Iron and manganese removal is the classic job, especially in groundwater systems where both occur naturally. Stoichiometry puts the demand at 0.94 mg/L of potassium permanganate per mg/L of ferrous iron and 1.92 mg/L per mg/L of manganese. Natural organic matter and sulfide add to that, so operators settle the final dose by jar test and residual. Underdose and manganese slips through the filter; overdose and customers call about pink water. Permanganate also oxidizes hydrogen sulfide and serves as a pre-oxidant ahead of coagulation.

Two limits are worth knowing. Permanganate barely touches geosmin and MIB, the earthy, musty compounds behind most summer taste complaints; those call for powdered activated carbon such as CarbPure TRA, fed at a separate point because carbon consumes permanganate. And during cyanobacteria blooms, keep doses moderate: permanganate is far gentler on cells than chlorine, but an excessive dose can still rupture cells and release the toxins inside them.

Industrial Wastewater

Permanganate oxidizes phenols, sulfide, and many odor compounds in process water and wastewater, and the manganese dioxide it forms settles with the sludge. Because it persists and shows its endpoint by color, it’s easy to control in batch tanks.

Mine Water

Manganese is often the hardest metal to bring down at a mine. Removing it with lime or caustic alone usually means raising the pH to about 10, and manganese precipitated that way can redissolve when the pH drops again. Oxidizing it to manganese dioxide with permanganate at near-neutral pH avoids both problems. It costs more per pound than alkali and doesn’t remove copper, nickel, or zinc, so it typically follows neutralization as a dedicated manganese step.

Supplying Potassium Permanganate for Water Treatment

We ship dry crystals in 55-lb pails and 330-lb drums. For systems without dissolving equipment, we deliver pre-mixed solution up to 5% in drums and totes, or by tanker for volumes above 3,000 gallons. If your feed system wants a stronger liquid, sodium permanganate delivers the same chemistry at 40%. Send your design dose and flow, and we’ll turn them into quantities and a delivery schedule. See all Hepure water treatment chemicals.

Other Applications

The same oxidation chemistry does steady work outside remediation and municipal treatment. Hepure supplies potassium permanganate for golf course pond and irrigation treatment, zebra and quagga mussel control in intakes and pipe systems, and biofouling control in irrigation lines.

Why Choose Hepure’s Potassium Permanganate?

Verified Purity for Remediation

The quality of the chemical amendments used in your remediation project matters — what gets put in the ground stays in the ground. Hepure regularly tests all products through independent laboratory analysis (Galbraith Laboratories, Inc.) to identify trace metals that could be harmful to groundwater chemistry. Our potassium permanganate consistently tests as one of the purest products available for in situ remediation, with particular emphasis on the metals of concern at contaminated sites: arsenic, chromium, mercury, and lead — all of which test below detection limits.

Trace Metals Analysis

Element	Test Result (mg/kg)	Detection Limit (mg/kg)	Method
Silver (Ag)	ND	0.19	GLI Procedure ME-30
Arsenic (As)	ND	0.47	GLI Procedure ME-30
Beryllium (Be)	ND	0.47	GLI Procedure ME-30
Cadmium (Cd)	ND	0.094	GLI Procedure ME-30
Chromium (Cr)	ND	0.47	GLI Procedure ME-70
Copper (Cu)	ND	1.00	GLI Procedure ME-30
Mercury (Hg)	ND	0.029	GLI Procedure E80-3
Nickel (Ni)	ND	1.00	GLI Procedure ME-30
Lead (Pb)	ND	0.094	GLI Procedure ME-30
Antimony (Sb)	ND	0.19	GLI Procedure ME-30
Selenium (Se)	ND	0.94	GLI Procedure ME-30
Thallium (Tl)	ND	1.00	GLI Procedure ME-70
Zinc (Zn)	ND	1.00	GLI Procedure ME-30

ND = Not Detected. Laboratory: Galbraith Laboratories, Inc.

CFATS Compliance Support

Potassium permanganate is listed on the Department of Homeland Security’s Chemical Facility Anti-Terrorism Standards (CFATS) program. Hepure assists clients with preparation and maintenance of CSAT paperwork, so regulatory compliance does not slow down your project timeline.

Pre-Mixed Site-Ready Solutions

Don’t want to mix on site? Hepure delivers potassium permanganate as a pre-mixed solution in concentrations up to 5%, eliminating on-site dissolution, reducing health and safety exposure, and simplifying injection logistics.

Advantages and Considerations

Advantages	Considerations
Lower raw material cost — typically less expensive per unit of oxidant delivered than sodium permanganate Safer handling profile — solid form reduces spill risk compared to concentrated liquid oxidants pH neutral — no pH buffering required during application No heat or gas generation — stable reaction with target contaminants Flexible application — injection, soil mixing, and backfill treatment	CFATS regulated — requires compliance paperwork (Hepure provides full support) Maximum 5% solution — requires more water volume than sodium permanganate for equivalent oxidant delivery On-site mixing required — unless ordered as a pre-mixed site-ready solution

Packaging and Delivery Options

Format	Packaging
Dry Crystals	55-lb pails or 330-lb drums
Pre-Mixed Solution (<3,000 gal at ≤5%)	275-gallon totes and 55-gallon drums
Pre-Mixed Solution (>3,000 gal at ≤5%)	Tankers and/or 275-gallon totes

Frequently Asked Questions

What contaminants does potassium permanganate treat?

Potassium permanganate effectively oxidizes chlorinated solvents (TCE, PCE, DCE, vinyl chloride), PAHs, phenols, hydrogen sulfide, dissolved iron and manganese, and a range of other organic contaminants. It is one of the most widely used chemical oxidants in environmental remediation and water treatment.

What is the maximum concentration for potassium permanganate solutions?

Potassium permanganate dissolves in water at room temperature to a maximum practical concentration of approximately 5%. For applications requiring higher oxidant concentrations, sodium permanganate (available as a 40% liquid) may be the better fit.

How does potassium permanganate compare to sodium permanganate?

Both products deliver the same permanganate ion (MnO4⁻) and have identical oxidation chemistry. Potassium permanganate is typically less expensive per unit of oxidant and well suited to soil blending and lower-concentration applications. Sodium permanganate is preferred when high-concentration injection and minimal water handling are priorities. Read our full comparison.

Is potassium permanganate safe to handle?

Potassium permanganate is a strong oxidizer and must be handled with appropriate personal protective equipment, proper storage, and compatible materials. Always follow your site-specific health and safety plan and the product Safety Data Sheet.

Does potassium permanganate require CFATS compliance?

Yes. Potassium permanganate is listed under the DHS Chemical Facility Anti-Terrorism Standards (CFATS) program. Hepure provides full support with CSAT paperwork preparation and maintenance to keep your project on schedule.

Get a Quote for Your Project

Whether you need dry crystals, pre-mixed solutions, or bulk tanker delivery, we’ll recommend the right potassium permanganate product and packaging for your site conditions. Call 866-727-4776 — Pat Randall (x1) in the West, Bob Kelley, Ph.D. (x2) in the East — or contact our technical team for a quote and site-specific guidance. Our case studies show how permanganate has been applied on projects similar to yours.