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...