3-Chloro-6-(4-nitrophenoxy)pyridazine

3-Chloro-6-(4-nitrophenoxy)pyridazine is identified by CAS 1490-54-6 and molecular formula C10H6ClN3O3. PubChem resolves this CAS number uniquely to CID 6413022. The cited public record provides SMILES C1=CC(=CC=C1[N+](=O)[O-])OC2=NN=C(C=C2)Cl and InChIKey CDQRXRYRRITDBP-UHFFFAOYSA-N. The name, CAS number, formula, CID, SMILES, and InChIKey describe the same compound and form a precise, publicly traceable identity set for this catalog entry.

The verified molecule joins two aromatic regions through an oxygen atom. One side is a pyridazine ring carrying chlorine at position 3; the other is a phenoxy ring bearing a nitro group at its para position. The name 3-Chloro-6-(4-nitrophenoxy)pyridazine records both attachment sites. Formula C10H6ClN3O3 accounts for chlorine, three nitrogens, and the three oxygens distributed between the ether linkage and nitro group. Keeping the nested parentheses preserves the relationship between the nitrophenoxy substituent and position 6 of the diazine ring.

CAS 1490-54-6 resolves uniquely to PubChem CID 6413022. Its SMILES C1=CC(=CC=C1[N+](=O)[O-])OC2=NN=C(C=C2)Cl places OC2=NN=C(C=C2)Cl after the nitrophenyl fragment, preserving the 6-aryloxy and 3-chloro relationship on pyridazine. The nitro group appears through explicit positive and negative formal charges. InChIKey CDQRXRYRRITDBP-UHFFFAOYSA-N and formula C10H6ClN3O3 provide independent confirmation. These combined details separate this record from chloropyridazines lacking the para-nitrophenoxy substituent, from phenoxy isomers with another nitro locant, and from structures in which the two rings are joined without oxygen.