Triethylamine

Triethylamine (TEA) was first synthesized in the 19th century and emerged as an important industrial chemical in the 20th century. Large-scale commercial production began in the early 1900s, with the compound becoming a widely used base catalyst and chemical intermediate in numerous industrial processes [1]. TEA became particularly important in polyurethane foam manufacturing, serving as a catalyst and blowing agent in the production of flexible and rigid foams. The compound found additional use as a catalyst in epoxy resin systems, coatings production, and pharmaceutical synthesis [2]. By the late 20th century, triethylamine production reached hundreds of thousands of tons annually. Occupational exposure in foam manufacturing, chemical synthesis, and related industries represents an ongoing industrial hygiene concern [3].

Workers in polyurethane foam manufacturing face the highest occupational exposure to triethylamine vapor. Chemical synthesis workers and laboratory personnel encounter exposure during chemical production. Inhalation is the primary exposure route in occupational settings. Skin contact can occur during liquid handling. Environmental release can cause community exposure.

Triethylamine causes respiratory tract and eye irritation at moderate concentrations. The compound acts as a respiratory sensitizer, potentially causing occupational asthma in susceptible workers. Chronic inhalation exposure causes upper airway inflammation and potential systemic effects. The amine has characteristic odor properties that make it readily detectable. Reproductive effects are documented in animal studies at high doses.

Polyurethane foam manufacturing workers face the highest occupational risk. Chemical process operators and laboratory chemists encounter exposure. Workers with pre-existing asthma or respiratory conditions are more susceptible to sensitization. Individuals with atopic conditions face increased respiratory effect risk.