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 belongs to an aromatic amine compound, with two symmetrical amino groups, located on two rings, and bridged by a methylene (-CH2-). MDA is a white or light yellow crystalline solid at room temperature, with a...