4,4'-dichlorodiphenylmethane ; benzene, 1,1'-methylenebis(4-chloro- ; benzene, 1,1'-methylenebis[4-chloro- ; bis(4-chlorophenyl)methane ; bis(p-chlorophenyl)methane ; di-(4-chlorophenyl)methane ; di-(p-chlorophenyl)methane ; methane, bis(p-chlorophenyl)- ; p,p'-dichlorodiphenylmethane ; 1,1'-methylenebis(4-chlorobenzene) ; 1-chloro-4-(4-chlorobenzyl)benzene ; 1-chloro-4-[(4-chlorophenyl)methyl]benzene ; 4,4'-ddm ; 4-chlorobenzhydryl chloride ; alpha,4-dichloro-alpha-phenyltoluene ; benzene, 1-chloro-4-(chlorophenylmethyl)- ; bis(4-chlorobenzene)methane ; bis-(4-chlorophenyl)-methane ; bis(4'-chlorophenyl)methane ; bis(4'-chlorophenyl)methane (ddm) ; bis(chlorophenyl)methane ; chloro(p-chlorophenyl)phenylmethane ; dbm (the methane derivative) ; di(4-chlorophenyl)methane ; di(p-chlorophenyl)methane ; methane, bis(4-chlorophenyl)- ; methane, chloro(p-chlorophenyl)phenyl- (8ci)