(Dichloro)diphenylmethane .alpha.,.alpha.-Dichlorodiphenylmethane 2051-90-3 Benzene, 1,1'-(dichloromethylene)bis- Benzophenone dichloride DPM DPM (halocarbon) Dichlorodiphenyl methane Dichlorodiphenylmethane Diphenyldichloromethane Methane, dichlorodiphenyl- NSC37425