1,3-Diisocyanatobenzene 1,3-PHENYLENE DIISOCYANATE 123-61-5 Benzene 1,3-diisocyanate Benzene, 1,3-diisocyanato- Benzene, m-diisocyanato- Isocyanic acid, m-phenylene ester NSC511721 Nacconate 400 m-Phenylene diisocyanate m-Phenylene isocyanate