Potassium hydrogen sulfate

Potassium hydrogen sulfate is an inorganic chemical compound with the formula HKO4S and CAS number 7646-93-7. This acidic salt has a molecular weight of 136.17 g/mol and is classified as a corrosive substance. It appears as white crystalline solid and is highly soluble in water, forming acidic solutions. The compound is also known as potassium bisulfate and serves as an important industrial chemical for various applications requiring acidic properties.

Potassium hydrogen sulfate is a white crystalline solid at room temperature with excellent water solubility, forming strongly acidic solutions. The compound has a molecular weight of 136.17 g/mol and is odorless. It is hygroscopic, meaning it absorbs moisture from air. When dissolved, it releases hydrogen ions, making solutions corrosive. The substance is stable under normal conditions but can decompose at high temperatures, releasing sulfur oxides.

Potassium hydrogen sulfate is used primarily as an acidifying agent in various industrial processes and laboratory applications. It serves as a flux in metallurgy, helping to remove oxides from metal surfaces during welding and soldering. The compound is also employed in analytical chemistry for sample digestion and pH adjustment. Additionally, it finds applications in the production of fertilizers, as a food additive for pH control, and in certain cleaning formulations where acidic properties are required.

Potassium hydrogen sulfate must be handled with appropriate personal protective equipment due to its corrosive nature (Skin Corr. 1B classification). Wear chemical-resistant gloves, safety goggles, and protective clothing to prevent skin and eye contact. Ensure adequate ventilation in work areas and avoid inhalation of dust particles. Use non-sparking tools and equipment. Always work in well-ventilated areas and have eyewash stations and safety showers readily available. Handle containers carefully to prevent spills and dust generation.

Potassium hydrogen sulfate should be stored in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Keep containers tightly closed and store in original packaging or compatible containers made of corrosion-resistant materials. Separate from incompatible materials such as strong bases, metals, and organic compounds. Protect from moisture due to its hygroscopic nature. Ensure storage areas have appropriate spill containment measures and maintain temperatures below 25°C for optimal stability.

In case of skin contact with potassium hydrogen sulfate, immediately remove contaminated clothing and flush the affected area with plenty of water for at least 15 minutes. For eye contact, rinse immediately with clean water for 15-20 minutes and seek medical attention promptly. If inhaled, move the person to fresh air and seek medical advice if respiratory irritation occurs. In case of ingestion, rinse mouth and drink water, but do not induce vomiting. Always seek medical attention for significant exposures.

Potassium hydrogen sulfate must be disposed of according to local, regional, and national waste regulations as it is classified as hazardous waste. Do not dispose of in regular trash or pour down drains. Contact licensed waste disposal companies for proper treatment and disposal. Small quantities can be neutralized carefully with appropriate bases under controlled conditions by trained personnel, but this should only be done following proper procedures. Always consult with environmental authorities for specific disposal requirements in your region.

Potassium hydrogen sulfate is classified as ADR Class 8 (corrosive substances) with Packing Group II, indicating moderate danger level during transport. It requires appropriate hazardous goods packaging, labeling, and documentation according to ADR regulations. Use UN-approved containers and display proper hazard labels including corrosive symbols. Transport vehicles must carry appropriate emergency equipment and documentation. Drivers need ADR certification for dangerous goods transport. Ensure compliance with routing restrictions and emergency response procedures during transportation.

Potassium hydrogen sulfate is subject to various chemical regulations including REACH registration requirements in Europe and CLP classification as a corrosive substance with danger signal word. It is not listed as an SVHC (Substance of Very High Concern). The compound requires safety data sheets and proper hazard communication under GHS, displaying pictograms GHS05 and GHS07. Industrial users must comply with occupational safety regulations and may need permits for storage and use depending on quantities and local requirements.

Potassium hydrogen sulfate is available through OYSI, a European distributor specializing in technical chemicals for industrial applications. OYSI provides quality chemical products with proper documentation, safety data sheets, and regulatory compliance support throughout Europe. As a professional chemical distributor, OYSI ensures reliable supply chains and technical support for industrial customers. Contact OYSI directly for pricing, availability, packaging options, and delivery information specific to your requirements and location within Europe.