16diaminohexane

1,6-hexanediamine, also known as hexamethylenediamine or HMDA, is an aliphatic diamine with the molecular formula C6H16N2. It consists of a linear six-carbon backbone terminated by amino groups on both ends, giving it the common name 1,6-hexanediamine.

Industrial production occurs mainly by the hydrogenation of adiponitrile, which itself is derived from butadiene and hydrogen cyanide. HMDA is a colorless liquid that is miscible with water and has a relatively high boiling point compared with many other amines.

HMDA is a versatile building block in polymer chemistry. It is a key monomer for the production of polyamides such as nylon 6,6, formed through condensation with adipic acid. It is also used as a curing agent for epoxy resins and as a chain extender in polyurethanes and polyureas, where it helps to increase molecular weight and modify mechanical properties.

Safety and handling information indicate that HMDA can be corrosive and may irritate skin, eyes, and the respiratory tract. It should be handled with appropriate personal protective equipment in a well-ventilated area, and stored in closed, clearly labeled containers away from oxidizers. Proper disposal and spill response procedures are recommended in accordance with local regulations.