Hexamethylenediamine

Hexamethylenediamine (HMDA), also known as 1,6-hexanediamine or 1,6-diaminohexane, is a difunctional aliphatic diamine with CAS 124-09-4. It carries no E-code designation and is classified under the amines category, with HS code 29212290.

In polymer manufacturing, HMDA reacts with diacids such as adipic acid to form polyamide chains, most notably Nylon-6,6, through condensation polymerization. In personal care formulations, it functions as a crosslinker and pH buffer, building network structures in conditioning systems and stabilizing acidic or alkaline formulations within target ranges.

HMDA is available in food-contact and technical grades, supplied as pellets or flakes. It is subject to REACH registration requirements within the EU. Procurement quantities typically range from drum to bulk tanker formats, and buyers should confirm grade suitability against FCC or internal specification standards prior to ordering.