Sodium dimethylarsinate

Sodium dimethylarsinate is an organoarsenic compound with the chemical formula C2H6AsNaO2 and CAS number 124-65-2. This chemical substance has a molecular weight of 159.98 g/mol and belongs to the family of arsenical compounds. It appears as a sodium salt of dimethylarsinic acid and is used in various industrial applications. The compound contains arsenic as its central element bonded to two methyl groups and coordinated with sodium, making it a specialized chemical intermediate in organoarsenic chemistry.

Sodium dimethylarsinate is typically a white to off-white crystalline solid at room temperature with good water solubility due to its ionic sodium salt structure. The compound has a molecular weight of 159.98 g/mol and contains arsenic as the central atom. It is generally stable under normal conditions but should be protected from moisture and strong oxidizing agents. The presence of the sodium cation makes it highly soluble in polar solvents, particularly water, while showing limited solubility in organic solvents.

Sodium dimethylarsinate serves as a chemical intermediate in the synthesis of various organoarsenic compounds and specialty chemicals. It is primarily used in research applications, pharmaceutical intermediate synthesis, and specialized industrial processes requiring organoarsenic chemistry. The compound finds applications in analytical chemistry as a reference standard and in the development of arsenic-based materials. Due to its specific chemical structure, it may also be utilized in metal treatment processes and as a precursor for other arsenical derivatives in controlled industrial environments.

Sodium dimethylarsinate requires careful handling with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and laboratory coats. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation exposure. Avoid direct skin and eye contact, and ensure no ingestion occurs. Given its arsenic content, follow strict hygiene protocols including thorough hand washing after handling. Use non-sparking tools and avoid generating dust. Implement proper containment measures to prevent environmental release and ensure all personnel are trained in safe handling procedures.

Sodium dimethylarsinate should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from incompatible materials. Keep containers away from heat sources, direct sunlight, and moisture to maintain product stability. Store separately from strong oxidizers, acids, and food products. Ensure storage areas are equipped with appropriate spill containment measures and maintain temperatures within recommended ranges. Use original labeled containers and implement a first-in-first-out inventory system. Access should be restricted to authorized personnel only, with proper security measures in place.

In case of skin contact with sodium dimethylarsinate, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. For eye contact, flush immediately with clean water for 15-20 minutes while holding eyelids open. If inhaled, move the person to fresh air immediately and monitor breathing. In case of ingestion, do not induce vomiting and seek immediate medical attention. Always consult a physician or poison control center after any significant exposure, providing them with the safety data sheet and exposure details.

Sodium dimethylarsinate must be disposed of as hazardous waste through licensed waste management companies specializing in arsenic-containing materials. Never dispose of this compound in regular trash, sewage systems, or by incineration without proper controls. Contact certified hazardous waste disposal services and provide complete chemical identification and safety data. Follow all local, national, and EU regulations regarding arsenic waste disposal. Ensure proper packaging and labeling for transport to disposal facilities, and maintain disposal records for regulatory compliance. Consider waste minimization and recovery options where applicable.

Sodium dimethylarsinate is classified under ADR Class 6.1 (Toxic substances) Packing Group II, requiring specialized transport procedures for dangerous goods. Shipments must use UN-approved packaging with proper labeling and documentation including dangerous goods declarations. Transport vehicles must carry appropriate emergency equipment and drivers need ADR certification. Ensure packages are properly secured, labeled with hazard symbols, and accompanied by transport documents. Follow routing restrictions and notify relevant authorities as required. Only use carriers licensed for dangerous goods transport and maintain traceability throughout the shipping process.

Sodium dimethylarsinate is subject to various European regulations including REACH registration requirements for chemical substances. As an arsenic-containing compound, it falls under strict monitoring and reporting obligations. The substance requires proper classification and labeling under CLP regulation, though it currently shows no specific GHS classifications in available data. Companies must maintain safety data sheets, implement risk management measures, and ensure regulatory compliance. Users must follow occupational exposure limits and workplace safety regulations. Import/export may require additional permits due to arsenic content restrictions in various jurisdictions.

Sodium dimethylarsinate is available through OYSI, a specialized European distributor of technical chemicals serving industrial and research customers across Europe. As a professional chemical supplier, OYSI provides quality assurance, regulatory compliance support, and technical expertise for arsenic-containing compounds. European customers can contact OYSI for availability, specifications, and ordering information. Due to the specialized nature and regulatory requirements of this compound, procurement typically requires verification of end-use applications and compliance with relevant safety and handling regulations.