When you think of versatile chemical compounds, a bright purple, crystalline salt might not immediately come to mind. However, exploring potassium permanganate uses reveals a fascinating world of applications that span across municipal infrastructure, medical care, and even wilderness survival.
Regardless of whether you’re a chemistry student, a homesteader, or simply an inquisitive reader, learning about this potent oxidiser can be very beneficial for you. This article will examine seven different uses for this interesting compound, delving into the chemistry behind it that makes it so safe for everyday use.
What Is Potassium Permanganate and How Does It Work?
Before delving into its uses, it is interesting to note that it has a chemical composition that is known as KMnO4, which is an inorganic compound that is capable of dissolving in water, thus forming a vibrant purple or pink solution.
The strength of KMnO4 is that it is an oxidiser. In chemistry, an oxidiser is something that is capable of accepting an electron from another compound or substance. As such, when it is exposed to organic compounds, bacteria, or even minerals, it is capable of reacting with these compounds by breaking them down. This is what makes it useful for all its applications, including odor removal, destruction of bacteria, and separation of minerals from water.
Potassium Permanganate powder in Water Treatment for Safe Drinking
One of the most widespread and globally important applications of this chemical is found in municipal and private water management.
- Municipal Water Purification: Large-scale water purification facilities depend on this chemical extensively to make water potable for millions of citizens. This chemical is very effective in oxidizing dissolved iron, manganese, and hydrogen sulfide into solid particles when it is added to water sources. Once these impurities are in solid form, it is easy for filters in purification facilities to remove them before the water reaches our faucets. It also eliminates freshwater snails and inhibits biological growth that leads to bad tastes in public water.
- Private Well Water Maintenance: Homeowners who utilize private wells often experience problems with “rotten egg” smells, which are usually due to hydrogen sulfide gases, or rusty water, which may be due to high iron content. A specialized filter known as ‘greensand,’ which utilizes a regeneration solution of weak KMnO4, can easily resolve problems with hydrogen sulfide gases and iron content. As clean water flows through this treated filter, the hydrogen sulfide gases are eliminated, and iron particles are precipitated, thus supplying clean, clear, and odor-free water.
Medical Applications: Potassium Permanganate for Skin Conditions
Aside from the industrial water treatment, this purple salt has a long history of use in dermatology and first aid. Because of its astringent and antiseptic properties, this compound is very effective in the management of localized infections.
- Treating Weeping Eczema and Blisters: Dermatologists have been known to suggest very diluted baths or soaks for individuals who are suffering from severe cases of eczema or blistering rashes. This is because the astringency dries out the blistering or oozing sores, promoting faster healing while also discouraging the onset of bacterial infection.
- First Aid for Fungal and Bacterial Infections: A mild antiseptic, a very diluted solution often pink in color, can be used to treat minor wounds, ulcers, and even fungal infections like athlete’s foot. The oxidative stress this antiseptic induces in the cell walls of the pathogens leads to their destruction. This antiseptic is a traditional remedy and a staple in many medical settings, especially in areas where antibiotics and antifungal creams may be hard to come by, and when treating resistant surface pathogens.
Emergency Preparedness: The Potassium Permanganate pure Fire Starter
Survivalists and outdoor enthusiasts carry small vials of these purple crystals in their emergency kits, not only for water purification and medical purposes, but for an entirely different, heat-producing purpose.
- Wilderness Survival and Fire Starting: When potassium permanganate crystals and a carbohydrate-rich liquid, such as glycerin (or, in a pinch, antifreeze), are mixed, they react with an intense heat. In a matter of seconds, the chemical mixture smokes and spontaneously combusts into a bright, hot flame. It is an extremely reliable fire starter, even in damp and freezing conditions, where conventional matches and lighters would not function. Both chemicals are cheap and have secondary uses, which makes them highly sought after by the survival community.
Agricultural Benefits: Potassium Permanganate crystal for Plants and Fish
The agricultural and aquaculture sectors also utilize the oxidative properties of this compound to maintain healthy crops and livestock.
- Disease Control in Aquaculture: Fish farmers and aquarium hobbyists often utilise this chemical for water quality management and disease control. This chemical is very effective for the control of parasitic diseases, bacterial gill diseases, and fungal diseases occurring in the fish population. By precisely regulating the dosage, aquarists are able to control the organic matter present in the water and destroy external parasites infecting the fish without harming the fish, thus maintaining a healthy aquarium.
- Disinfectant and Fungicide: for Plants In the field of agriculture and horticulture, the prevention of the spread of diseases is important. It is used to disinfect tools, pots, and benches in the greenhouse by mixing it with water, which kills the spores and bacteria still present. It can also be used to prevent certain root rot and fungal infections in plants, which makes it a non-systemic fungicide.
Important Potassium Permanganate Safety and Side Effects
Although these benefits are numerous, it must also be remembered that this is a very reactive and dangerous chemical.
When concentrated in its crystalline form, this chemical can be very corrosive, resulting in burns, eye irritation, and even respiratory problems should it be inhaled. As this chemical is a strong oxidizer, it must always be stored carefully, far from combustible materials, acids, and organic compounds, lest any dangerous chemical reactions occur.
When applied as a skin treatment, should the solution be too concentrated, that is, dark purple instead of pale pink, this can lead to serious chemical burns and even permanent skin discoloration. Should ingestion of these crystals or concentrated solutions occur, this can lead to serious toxicity, thus requiring immediate emergency care. Always wear proper protective gear, like gloves and safety goggles, should you need to handle these raw crystals, and follow carefully precise ratios of dilution for any intended use.
