Tetramethylhexamethylenediamine

Tetramethylhexamethylenediamine (CAS 111-18-2), commonly abbreviated as TMHDA, is a tertiary diamine used across polymer chemistry, catalysis, and specialty chemical synthesis. Known also as 1,6-Bis(dimethylamino)hexane, it functions primarily as a catalyst, curing agent, and pH modifier in industrial formulations. In polyurethane and epoxy systems, it acts as a curing and crosslinking agent.

It influences gel time and final network density, which are parameters critical to formulators specifying mechanical performance. It serves as a catalyst precursor in organometallic and coordination chemistry. Its bifunctional amine structure supports ligand design for pharmaceutical and fine chemical synthesis. In personal care formulations, it contributes to pH regulation in systems requiring controlled alkalinity.

This is achieved without introducing ionic burden. Polymer producers also use it as a chain extender or modifier in specialty nylon and polyamide development for various industrial applications. TMHDA is supplied as a liquid at standard commercial purity levels, typically 98% or higher. Technical grade is the most common specification for industrial polymer and catalyst applications.

Pharmaceutical-grade supply is available from select manufacturers where synthesis intermediates require tighter impurity profiles. Buyers should confirm specification documentation on a supplier-by-supplier basis.