Potassium hydroxide

Potassium hydroxide is a strong inorganic base with the chemical formula KOH and CAS number 1310-58-3. This alkali metal hydroxide has a molecular weight of 56.106 g/mol and appears as white, deliquescent pellets or flakes. It is highly caustic and classified as corrosive to skin (Skin Corr. 1A) and acutely toxic (Acute Tox. 4). Potassium hydroxide readily absorbs moisture and carbon dioxide from air, making proper storage essential.

Potassium hydroxide is a white crystalline solid at room temperature, typically available as pellets, flakes, or powder. It is odorless and highly hygroscopic, readily absorbing moisture from air. KOH is extremely soluble in water, producing significant heat upon dissolution. The substance has a high melting point of approximately 406°C and is also soluble in alcohols. Its highly alkaline nature makes it strongly corrosive to organic materials.

Potassium hydroxide serves multiple industrial applications as a strong base and pH regulator. It is widely used in soap and detergent manufacturing, chemical synthesis, and as an electrolyte in alkaline batteries. Other applications include food processing as a pH adjuster, petroleum refining, textile processing, and metal cleaning. KOH is also essential in the production of potassium salts, biodiesel manufacturing, and various pharmaceutical intermediates.

Potassium hydroxide requires strict safety measures due to its corrosive nature and acute toxicity classification. Always wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, face shields, and protective clothing. Work in well-ventilated areas or under fume extraction systems. Avoid contact with skin, eyes, and respiratory system. Keep emergency eyewash stations and safety showers readily accessible. Handle with non-metallic tools and equipment when possible.

Potassium hydroxide must be stored in tightly sealed, moisture-proof containers in a dry, well-ventilated area. Keep away from acids, metals, and organic materials due to incompatibility risks. Store in original packaging or approved chemical-resistant containers, preferably made of plastic or lined steel. Maintain storage areas below 25°C and protect from humidity. Ensure proper labeling and segregation from incompatible substances to prevent dangerous reactions.

Potassium hydroxide contact requires immediate emergency response due to its corrosive properties. For skin contact, immediately flush with copious amounts of water for at least 15 minutes while removing contaminated clothing. In case of eye contact, rinse continuously with clean water and seek immediate medical attention. If inhaled, move to fresh air and monitor breathing. For ingestion, do not induce vomiting and seek emergency medical care immediately.

Potassium hydroxide disposal must comply with local and European waste regulations as hazardous chemical waste. Never dispose of KOH down drains or with regular waste due to its corrosive nature. Small quantities can be carefully neutralized with dilute acid under controlled conditions by trained personnel. Large quantities require disposal through licensed hazardous waste contractors. Always consult local environmental authorities for specific disposal requirements and approved facilities.

Potassium hydroxide is classified as ADR Class 8 (corrosive substances), Packing Group II, requiring specialized transport procedures. It must be packaged in UN-approved containers with appropriate hazard labels and documentation. Transport vehicles need proper placarding and emergency equipment. Drivers require ADR training certification for dangerous goods transport. Ensure proper segregation from incompatible materials during transit and comply with routing restrictions for hazardous materials.

Potassium hydroxide is subject to comprehensive European chemical regulations under REACH and CLP frameworks. It requires safety data sheets, hazard classification labeling with GHS pictograms GHS05 and GHS07, and 'Danger' signal word. The substance is not identified as SVHC (Substance of Very High Concern). Industrial users must comply with occupational exposure limits, worker protection requirements, and environmental discharge regulations. Professional training for handling personnel is typically mandatory.

Potassium hydroxide is available through OYSI, a specialized European distributor of industrial chemicals. OYSI provides reliable supply chains across Europe with proper documentation, safety data sheets, and regulatory compliance support. Professional chemical distributors like OYSI ensure product quality, appropriate packaging, and technical support for industrial applications. Contact OYSI directly for availability, specifications, and delivery options tailored to your specific requirements and location within Europe.