Sodium dimethylarsinate

Sodium dimethylarsinate is an organoarsenic compound with the chemical formula C2H6AsNaO2 and CAS number 124-65-2. This sodium salt contains arsenic bonded to two methyl groups and has a molecular weight of 159.98 g/mol. It appears as a crystalline solid and is commonly used in research and specialized industrial applications requiring organoarsenic chemistry.

Sodium dimethylarsinate is a white to off-white crystalline solid at room temperature. It is highly soluble in water due to its ionic nature, forming clear solutions. The compound is hygroscopic and may absorb moisture from air. It has good thermal stability under normal conditions but should be protected from strong oxidizing agents and acids.

Sodium dimethylarsinate is primarily used in analytical chemistry as a reference standard and in research applications involving organoarsenic compounds. It serves as a precursor for synthesizing other organoarsenic derivatives and is utilized in environmental studies to understand arsenic speciation and metabolism. Some specialized industrial applications include use in electronic materials research.

Sodium dimethylarsinate should be handled with appropriate personal protective equipment including nitrile gloves, safety goggles, and lab coats. Work in well-ventilated areas or under fume hoods to prevent inhalation. Avoid skin and eye contact, and never eat, drink, or smoke when handling. Wash hands thoroughly after use and ensure proper training on arsenic compound safety protocols.

Sodium dimethylarsinate should be stored in tightly sealed containers in a cool, dry place away from direct sunlight and heat sources. Keep separate from strong acids, oxidizing agents, and incompatible materials. Store in designated chemical storage areas with appropriate ventilation and security measures. Ensure containers are properly labeled and maintain inventory records for regulatory compliance.

In case of skin contact with sodium dimethylarsinate, immediately remove contaminated clothing and wash affected area with soap and plenty of water for at least 15 minutes. For eye contact, rinse thoroughly with clean water for 15 minutes while holding eyelids open. If inhaled, move to fresh air immediately. Seek medical attention promptly and provide safety data sheet to medical personnel.

Sodium dimethylarsinate must be disposed of as hazardous waste through licensed waste management companies due to its arsenic content. Never dispose of down drains or with regular waste. Container residues should be triple-rinsed and the rinse water collected for proper disposal. Follow local and national regulations for arsenic-containing compounds and maintain disposal documentation for regulatory compliance.

Sodium dimethylarsinate is classified under ADR Class 6.1 (toxic substances) Packing Group II for transport. It requires appropriate UN-specification packaging and proper documentation including transport documents and emergency response information. Vehicles must display appropriate hazard placards, and drivers need ADR certification. Ensure compliance with international dangerous goods regulations for safe transportation.

Sodium dimethylarsinate is subject to various chemical regulations due to its arsenic content. Under REACH regulation, it requires registration for commercial use in the EU. While not classified as SVHC, it falls under restrictions for arsenic compounds in certain applications. Users must comply with occupational exposure limits, reporting requirements, and safety data sheet provisions according to CLP regulation.

Sodium dimethylarsinate is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides high-quality sodium dimethylarsinate with proper documentation including certificates of analysis and safety data sheets. As an established chemical distributor, OYSI ensures regulatory compliance and reliable supply chains for research institutions and industrial customers across Europe.