news toxicity assessment of 4,4′-diaminodiphenylmethane and its safety protection measures in industrial production overview of 4,4'-diaminodimethane 4,4'-diaminodiphenylmethane (4,4'-diaminodiphenylmethane, referred... 02/18724'-diaminodiphenylmethane and its safety protection measures in industrial production Toxicity assessment of 4