Dipotassium;sulfide

Dipotassium sulfide is an inorganic compound with the chemical formula K2S and CAS number 1312-73-8. This ionic salt consists of two potassium cations and one sulfide anion, resulting in a molecular weight of 110.26 g/mol. It appears as a crystalline solid that is highly reactive and corrosive, classified as a dangerous substance under GHS regulations with the signal word "Danger" and requiring special handling precautions.

Dipotassium sulfide is a solid crystalline compound that typically appears as white to pale yellow crystals or powder. It is highly soluble in water, forming strongly alkaline solutions that can generate hydrogen sulfide gas upon contact with acids or moisture. The compound is hygroscopic, meaning it readily absorbs moisture from air, and exhibits strong basic properties due to the sulfide ion's ability to hydrolyze in aqueous solutions.

Dipotassium sulfide is primarily used in analytical chemistry as a reagent for detecting heavy metals and in qualitative analysis procedures. It serves as a sulfur source in various chemical syntheses and can be employed in the preparation of other sulfide compounds. Industrial applications include use in certain metallurgical processes and as an intermediate in specialized chemical manufacturing, though its highly corrosive nature limits its widespread commercial use.

Dipotassium sulfide requires strict safety measures due to its corrosive nature (Skin Corr. 1B classification). Essential protective equipment includes chemical-resistant gloves, safety goggles, face protection, and appropriate respiratory protection. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation of dust or vapors. Avoid contact with acids, moisture, and incompatible materials. Always wear protective clothing and ensure emergency shower and eyewash stations are readily accessible.

Dipotassium sulfide must be stored in tightly sealed, dry containers to prevent moisture absorption and decomposition. Keep in a cool, dry, well-ventilated area away from incompatible substances such as acids, oxidizing agents, and metals. Storage areas should be equipped with appropriate spill containment measures and warning signs. The ADR Class 4.2 classification requires compliance with regulations for substances liable to spontaneous combustion, necessitating proper segregation and storage protocols.

Dipotassium sulfide contact requires immediate emergency response due to its corrosive properties. For skin contact, immediately remove contaminated clothing and flush the affected area with copious amounts of water for at least 15 minutes. In case of eye contact, rinse immediately with water for at least 15 minutes while holding eyelids open. If inhaled, move to fresh air immediately. Seek medical attention promptly for all exposure routes, especially for severe burns or respiratory distress.

Dipotassium sulfide disposal must comply with local and European waste regulations as it is classified as hazardous waste. The substance cannot be disposed of through regular waste streams due to its corrosive nature and aquatic toxicity (Aquatic Acute 1). Contact licensed hazardous waste disposal companies for proper treatment and disposal. Never discharge into drains, soil, or water bodies. Small quantities may require neutralization under controlled conditions before disposal, following appropriate safety protocols.

Dipotassium sulfide transportation is regulated under ADR Class 4.2 (substances liable to spontaneous combustion) with Packing Group II classification. Packages must comply with UN specification requirements and bear appropriate hazard labels including the corrosive and environmental hazard pictogrammes (GHS05, GHS09). Shipping documentation must include proper shipping names, hazard classes, and emergency response information. Only certified carriers experienced in handling dangerous goods should transport this substance.

Dipotassium sulfide is subject to multiple European regulations including CLP (Classification, Labelling and Packaging) requiring hazard classification as Skin Corr. 1B and Aquatic Acute 1. REACH registration may apply depending on quantities and uses. The substance is not currently listed as an SVHC (Substance of Very High Concern). Transportation falls under ADR dangerous goods regulations, and workplace exposure limits may apply under occupational safety directives in various EU member states.

Dipotassium sulfide is available through OYSI, a European distributor specializing in technical chemical products. As an established chemical distributor, OYSI can provide this regulated substance to qualified industrial and research customers across Europe. Due to the hazardous nature and regulatory requirements of dipotassium sulfide, purchases typically require documentation of proper handling capabilities, intended use, and compliance with applicable safety and environmental regulations. Contact OYSI directly for availability and specific requirements.