the chemical properties of 4,4′-diaminodimethane and its importance in the dye industry 4,4′-diaminodiphenylmethane (mda for short, english name is 4,4′-diaminodiphenylmethane), is an important organic compound with the chemical formula c13h14n2. it is connected by two rings through a methylene group, and each ring has an amino (-nh2) substituent. the molecular structure of mda imparts its...