Potassium Hydroxide
Potassium Hydroxide Supplier
Potassium Hydroxide (KOH), also known as caustic potash, is a strong inorganic base with a distinct advantage over its sodium counterpart: the potassium it contains. Valued for producing softer, more soluble soaps, serving as the preferred catalyst in biodiesel production, and delivering potassium nutrition in agricultural applications, caustic potash is an essential chemical across a wide range of industries. With more than 75 years of experience as a pioneering innovator, Alexander Chemical supplies top-quality Potassium Hydroxide in liquid and solid forms, backed by expert technical guidance and reliable bulk delivery services. Safety and compliance are our top priorities.
Key Characteristics of Potassium Hydroxide
Chemical Properties
- Potassium Hydroxide Formula: KOH
- Appearance: Clear, colorless liquid (typically 45–50% solution) or white flakes/pellets
- Odor: Odorless
- Solubility: Highly soluble in water (highly exothermic dissolution)
- pH (solution): Strongly alkaline (pH 13–14)
- Molecular Weight: 56.11 g/mol
Storage & Handling Requirements
- Store in HDPE, stainless steel, or carbon steel tanks; keep tightly sealed
- Keep away from acids, CO₂, moisture, and reactive metals (aluminum, zinc)
- Always add KOH to water slowly — never add water to concentrated KOH
Potassium Hydroxide is a hazardous material. A strong caustic base — highly exothermic when dissolved in water or neutralized with acids. Corrosive to many metals, generating flammable hydrogen gas. Absorbs carbon dioxide and moisture from air. Mishandling can lead to serious safety and environmental risks. Always rely on certified professionals for storage, handling, and transportation.
What are the Uses of Potassium Hydroxide?
Potassium Hydroxide is a highly versatile strong base with a distinct chemical identity from sodium hydroxide — its potassium content makes it the preferred choice in a range of applications where sodium is undesirable or where potassium nutrition is beneficial.
Liquid Soap & Personal Care
The most recognized application of potassium hydroxide is in the production of liquid soaps, soft soaps, and personal care products. Unlike sodium hydroxide, which produces hard bar soaps, KOH saponification yields softer, more water-soluble potassium soaps with superior lathering properties. It is the foundation of liquid hand soaps, body washes, shaving creams, and many cosmetic formulations.
Biodiesel Production
Potassium hydroxide is a preferred catalyst in the transesterification of vegetable oils and animal fats to produce biodiesel. It reacts with methanol to form potassium methoxide, which drives the conversion of triglycerides to fatty acid methyl esters (FAME) — the chemical basis of biodiesel fuel.
Fertilizer & Agriculture
Potassium hydroxide is used in the production of potassium-based fertilizers and as a direct soil amendment where both pH adjustment and potassium nutrition are needed. It is a source of highly available potassium (K) for crop production and is used in formulating specialty liquid fertilizers.
Battery Electrolyte
Potassium hydroxide solution is the electrolyte of choice in alkaline batteries and certain fuel cells, where its high ionic conductivity and electrochemical stability enable efficient energy storage and conversion. It is critical to rechargeable nickel-metal hydride (NiMH) and nickel-cadmium (NiCd) batteries.
pH Control & Chemical Manufacturing
Potassium hydroxide is used for pH adjustment in water treatment, food processing, and chemical manufacturing. It is also a key reagent in the synthesis of potassium salts, catalysts, and specialty chemicals including Dutch process cocoa alkalization.
Bulk Potassium Hydroxide Delivery & Support Services
The professionals at Alexander Chemical bring decades of experience and expertise to managing Potassium Hydroxide with precision and care. We supply and deliver to municipal utilities, industrial facilities, and specialty operations across the country.
What We Offer
- Supplying and delivering Potassium Hydroxide in bulk tankers, totes, or drums tailored to your specific requirements
- On-site technical support for optimal dosing and application
- Regulatory compliance guidance and safety training
- Regular tank inspections and maintenance recommendations
A Brief History of Potassium Hydroxide
Potassium hydroxide has been produced in crude form for thousands of years — leaching wood ashes with water to produce potash lye was a fundamental chemical process in ancient and medieval civilizations, used for soap making, glass production, and textile treatment. The name ‘potassium’ itself derives from ‘potash.’ In 1807, Sir Humphry Davy made chemical history by electrolyzing molten potassium hydroxide to isolate elemental potassium for the first time — one of the landmark experiments in the history of chemistry. Modern industrial production via the electrolysis of potassium chloride brine (the chlor-alkali process analog for potassium) was developed in the late 19th century and remains the dominant production method today.
Potassium Hydroxide Facts
- Davy’s Electrolysis Breakthrough: In 1807, Sir Humphry Davy isolated elemental potassium for the first time by electrolyzing molten KOH — a landmark experiment that opened the era of alkali metal chemistry.
- Soft Soap Secret: The difference between hard bar soap and silky liquid soap comes down to one variable: KOH produces potassium soaps, which are softer and more water-soluble than the sodium soaps made with NaOH.
- Battery Power: The alkaline electrolyte in AA batteries, rechargeable NiMH cells, and many industrial power systems is a solution of potassium hydroxide — providing the ionic conductivity that makes energy storage possible.
- Dutch Process Chocolate: Potassium hydroxide is used to alkalize cocoa powder in the Dutch process — raising its pH to produce a milder, darker, more soluble chocolate with a richer color and smoother flavor.
- Ancient Potash: Potassium hydroxide (potash lye) was produced from wood ash leachate for millennia — one of the oldest chemical processes in human history, used for soap, glass, and textile bleaching before modern industry.
Frequently Asked Questions about KOH
What is potassium hydroxide?
Potassium hydroxide (KOH), also known as caustic potash, is a strong inorganic base produced industrially by the electrolysis of potassium chloride brine. It is supplied as white flakes or pellets (solid) or as a clear aqueous solution (typically 45–50% concentration) and is used across soap production, biodiesel manufacturing, agriculture, and chemical synthesis.
What is potassium hydroxide used for?
Potassium hydroxide is most widely used in liquid soap and personal care product manufacturing, biodiesel production, potassium-based fertilizers, alkaline battery electrolytes, and pH control in water treatment and chemical manufacturing. It is also used in food processing and specialty chemical synthesis.
What is the difference between potassium hydroxide and sodium hydroxide?
Both are strong bases, but KOH produces softer, more soluble potassium soaps while NaOH produces harder sodium soaps. KOH is preferred where potassium nutrition is beneficial (agriculture) or where sodium must be avoided. NaOH is typically less expensive and used at larger industrial volumes.
Is potassium hydroxide safe to handle?
Potassium hydroxide is a highly caustic material requiring careful handling. It causes severe burns on contact with skin and eyes, reacts exothermically with water and acids, and can corrode many metals. Proper PPE and certified handling procedures are essential. Alexander Chemical provides safety training and compliance guidance as part of our service offering.
How is potassium hydroxide delivered?
Alexander Chemical delivers potassium hydroxide via bulk tankers, intermediate bulk containers (totes), and drums based on your volume and site requirements. All deliveries are handled through Circle Transport, our dedicated logistics partner.
How should potassium hydroxide be stored?
Potassium hydroxide should be stored in HDPE, stainless steel, or carbon steel tanks, tightly sealed to prevent absorption of CO₂ and moisture. Keep away from acids and reactive metals. Alexander Chemical provides tank inspection and maintenance support as part of our delivery and compliance services.
What industries use potassium hydroxide?
Potassium hydroxide is used in soap and personal care manufacturing, biodiesel production, agricultural chemicals and fertilizers, battery and energy storage manufacturing, food processing, water treatment, and specialty chemical synthesis.
Where to buy potassium hydroxide in bulk?
Alexander Chemical supplies bulk potassium hydroxide with nationwide delivery. Contact our team to discuss your volume requirements, delivery schedule, and pricing.