The formation of dianilinodiphenylmethane as a product of the reaction of forinaldehyde with diphenylamine1s2 has long been claimed. However, the isolation of pure compounds from the products of the reaction has not heeii recorded up to this time. This is true notwithstanding the fact that Straus and Bormann3 succeeded in preparing p,, p '- dianilinodiphenylmethane in a series of reactions starting with p, p'- ...