Methylenebis(chloroaniline)

3,3'-Dichloro-4,4'-Diaminodiphenylmethane; 4,4'-Methylenebis(2-chloroaniline); MOCA
Aromatic diamine used in the plastics industry as curing agent for epoxy resins and urethane rubbers. It causes bladder, liver, lung, and other neoplasms.