4,4′-Diaminodimethane (MDA) Overview 4,4′-diaminodiphenylmethane (4,4′-Diaminodiphenylmethane, referred to as MDA), is an important organic compound that is widely used in chemical industry, materials science and polymer fields. Its chemical structure is connected by two rings through a methylene bridge, each with an amino functional group on each ring. This unique molecular structure imparts excellent thermal stability...