The chemical structure and basic properties of 4,4′-diaminodimethane 4,4′-diaminodiphenylmethane (4,4′-Diaminodiphenylmethane, referred to as MDA) is an important organic compound and is widely used in the research on the modification of functional polymer materials. Its chemical formula is C13H14N2 and its molecular weight is 198.26 g/mol. The molecular structure of MDA is connected by two rings...