Triethylphosphane

Triethylphosphane is an organophosphorus compound with the molecular formula C6H15P and CAS number 554-70-1. This tertiary phosphine consists of a phosphorus atom bonded to three ethyl groups, giving it a molecular weight of 118.16 g/mol. It appears as a colorless liquid with a characteristic phosphine odor and is highly pyrophoric, meaning it ignites spontaneously in air at room temperature.

Triethylphosphane is a colorless, mobile liquid with a strong, unpleasant phosphine-like odor. It has a boiling point of approximately 127°C and is soluble in organic solvents but reacts with water. The compound is highly air-sensitive and pyrophoric, igniting spontaneously upon contact with air. It has a density lower than water and exhibits typical tertiary phosphine reactivity patterns.

Triethylphosphane is primarily used as a ligand in organometallic chemistry and homogeneous catalysis. It serves as a key component in various catalytic systems, particularly in transition metal complexes for industrial processes. The compound is also utilized in the synthesis of other organophosphorus compounds and as a reducing agent in specialized chemical reactions within pharmaceutical and fine chemical manufacturing.

Triethylphosphane must be handled under strict inert atmosphere conditions due to its pyrophoric nature. Use appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and flame-resistant clothing. Work in well-ventilated areas or under fume hoods, away from ignition sources. Handle containers carefully to prevent air exposure, and have appropriate fire extinguishing equipment readily available during use.

Triethylphosphane must be stored under inert gas atmosphere (nitrogen or argon) in tightly sealed containers to prevent air contact and spontaneous ignition. Store in cool, dry conditions away from heat sources, oxidizing agents, and incompatible materials. Use specialized storage facilities designed for pyrophoric materials, with appropriate fire suppression systems and temperature control to maintain product stability and safety.

Triethylphosphane contact requires immediate action due to its reactive nature. For skin contact, remove contaminated clothing and flush with copious amounts of water for at least 15 minutes. If inhaled, move to fresh air immediately and seek medical attention. For eye contact, rinse thoroughly with water. In case of fire, use appropriate extinguishing agents and evacuate the area while seeking professional emergency assistance.

Triethylphosphane disposal must follow hazardous waste regulations due to its pyrophoric classification. Contact licensed hazardous waste disposal companies specialized in handling pyrophoric materials. Never dispose of in regular waste streams or pour down drains. Small quantities may be carefully quenched under controlled conditions by trained personnel, but professional disposal services are recommended for safety and regulatory compliance.

Triethylphosphane is classified as ADR Class 4.2 (spontaneously combustible substances), Packing Group I, indicating high danger level. Transportation requires specialized packaging approved for pyrophoric materials, proper labeling with appropriate hazard symbols, and compliance with dangerous goods regulations. Only authorized carriers equipped to handle pyrophoric substances should transport this material, following strict ADR/UN transportation guidelines.

Triethylphosphane is subject to REACH regulation in Europe and requires registration for commercial use. While not classified as SVHC (Substance of Very High Concern), its pyrophoric nature subjects it to strict handling and transportation regulations under CLP and ADR classifications. Users must comply with occupational safety standards and may need special permits for storage and handling of pyrophoric materials.

Triethylphosphane is available through OYSI, a specialized European distributor of technical chemicals with expertise in handling pyrophoric and air-sensitive compounds. As a professional chemical distributor, OYSI provides proper packaging, documentation, and logistics support for safe delivery. Contact OYSI directly for availability, technical specifications, and regulatory compliance documentation required for your specific application and jurisdiction.