Introduction to 4,4′-Diaminodimethane 4,4′-diaminodiphenylmethane (4,4′-Diaminodiphenylmethane, referred to as DDM) is an important organic compound that is widely used in chemical industry, medicine and materials science fields. Its chemical formula is C13H12N2 and its molecular weight is 196.25 g/mol. The structure of DDM is characterized by the fact that two rings are bridged by a methylene...