1,4-Diisocyanatobenzene 1,4-Phenylene diisocyanate 1,4-Phenylene diisocyanate [Diisocyanates] 104-49-4 51807-23-9 BENZENE, 1,4-DIISOCYANATO- EINECS 203-207-6 Isocyanic acid, p-phenylene ester (6CI,7CI,8CI) NSC 94776 p-Phenylene diisocyanate p-Phenylene isocyanate