tri2ethylhexyl

Tri(2-ethylhexyl) is a chemical moiety consisting of three units of the branched 2-ethylhexyl group, typically derived from 2-ethylhexanol. It is not a single compound on its own but a common esterifying fragment used to form larger esters with various acid moieties. The tri(2-ethylhexyl) group is favored for its bulky, hydrophobic character and its ability to reduce volatility.

Common compounds containing the tri(2-ethylhexyl) group include certain high-molecular-weight plasticizers and flame retardants, such as tri(2-ethylhexyl) trimellitate (TOTM) and tri(2-ethylhexyl) phosphate (TEHP). These esters are used in polymer formulations to impart flexibility, workability, and resistance to temperature changes. TOTM, in particular, is known for being relatively less volatile and for providing long-lasting flexibility in PVC and related materials. TEHP serves as a plasticizer and is also investigated for use in flame-retardant formulations.

Manufacture typically involves esterification of a suitable acid or backbone with 2-ethylhexanol to introduce the tri(2-ethylhexyl) substituents. The resulting esters are generally viscous, hydrophobic liquids with high molecular weight and low vapor pressures, contributing to their utility as plasticizers or additives in polymer systems.

Safety and environmental considerations vary by specific compound, but esters bearing the tri(2-ethylhexyl) group can be persistent in the environment and may pose health or ecological risks if misused or released in large quantities. They are usually handled under standard industrial hygiene practices, with material safety data sheets providing compound-specific guidance.