Triethylphosphane

Triethylphosphane is an organophosphorus compound with the chemical formula C6H15P and CAS number 554-70-1. This tertiary phosphine consists of a phosphorus atom bonded to three ethyl groups, resulting in a molecular weight of 118.16 g/mol. It appears as a colorless liquid with characteristic phosphine odor and serves as an important reagent in organic synthesis and catalysis applications.

Triethylphosphane is a colorless liquid at room temperature with a characteristic unpleasant phosphine odor. It has a molecular weight of 118.16 g/mol and is highly air-sensitive, readily oxidizing when exposed to atmospheric oxygen. The compound is soluble in organic solvents but reacts with water. It exhibits pyrophoric properties under certain conditions, requiring careful handling and storage under inert atmosphere.

Triethylphosphane is primarily used as a ligand in organometallic chemistry and homogeneous catalysis, particularly in transition metal complexes for various catalytic processes. It serves as a reagent in organic synthesis for phosphorylation reactions and as a reducing agent in certain chemical transformations. The compound is also utilized in research applications for developing new catalytic systems and studying phosphine coordination chemistry.

Triethylphosphane requires careful handling due to its pyrophoric nature and air sensitivity. Always work under inert atmosphere using nitrogen or argon, wear appropriate PPE including chemical-resistant gloves, safety goggles, and work in well-ventilated areas or fume hoods. Avoid contact with air, moisture, and oxidizing agents. Use proper grounding procedures to prevent static discharge and have appropriate fire suppression equipment readily available.

Triethylphosphane must be stored under inert atmosphere in tightly sealed containers, preferably under nitrogen or argon gas. Store in a cool, dry place away from heat sources, oxidizing agents, and moisture. Use amber glass bottles or stainless steel containers to protect from light. Maintain storage temperature below 25°C and ensure proper ventilation in storage areas. Keep away from incompatible materials including acids and bases.

Triethylphosphane contact requires immediate action due to its reactive nature. For skin contact, immediately remove contaminated clothing and flush affected area with copious amounts of water for at least 15 minutes. If inhaled, move person to fresh air and seek medical attention. For eye contact, rinse thoroughly with water for 15 minutes. In case of ingestion, do not induce vomiting and seek immediate medical attention.

Triethylphosphane disposal must comply with local and international hazardous waste regulations due to its reactive nature. The compound should be carefully oxidized under controlled conditions or neutralized by qualified professionals before disposal. Never dispose of down drains or in regular waste. Contact licensed hazardous waste disposal companies for proper treatment and disposal. Always consult local environmental authorities for specific disposal requirements and procedures.

Triethylphosphane is classified under ADR Class 4.2 (Spontaneously Combustible Substances), Packing Group I, indicating high transport risk. Transport requires specialized packaging meeting UN specifications, proper labeling with Class 4.2 hazard labels, and documentation including transport documents. Only authorized carriers experienced with pyrophoric materials should handle transportation. Vehicles must be equipped with appropriate safety equipment and drivers must have proper training certification.

Triethylphosphane is subject to various chemical regulations including REACH registration requirements in the European Union for commercial use. It falls under CLP regulation for classification and labeling, though specific harmonized classifications may vary. The compound is not currently listed as a SVHC (Substance of Very High Concern). Users must comply with local occupational safety regulations and may need to fulfill notification requirements depending on usage quantities and applications.

Triethylphosphane is available through specialized chemical distributors in Europe, including OYSI, which supplies high-quality organophosphorus compounds to industrial and research customers. Due to its specialized nature and handling requirements, the compound is typically available through established chemical suppliers with expertise in air-sensitive materials. Buyers should ensure suppliers can provide proper packaging, documentation, and technical support for safe handling and storage.