Overview of 4,4′-diaminodimethane 4,4′-diaminodiphenylmethane (4,4′-Diaminodiphenylmethane, referred to as MDA) is an important organic compound with the chemical formula C13H14N2. It is connected by two rings by a methylene group, each with an amino group (-NH2) on each ring. As an intermediate, MDA has a wide range of applications in industrial production, especially in the fields...