8-Bromo-6-chloro-3-iodoimidazo[1,2-b]pyridazine

A fused nitrogen heterocycle bearing three different halogens is recorded as 8-Bromo-6-chloro-3-iodoimidazo[1,2-b]pyridazine. CAS 1263425-59-7 and PubChem CID 86662987 refer to this same C6H2BrClIN3 identity. Its official SMILES is C1=C(C2=NC=C(N2N=C1Cl)I)Br, paired with InChIKey CSFRKRKCGOHTJB-UHFFFAOYSA-N.

The bracketed fusion descriptor in the name defines how the imidazole and pyridazine portions share atoms. Numbering then places iodine at position 3, chlorine at position 6, and bromine at position 8. Those three halogens are not interchangeable labels: each occupies a distinct vertex of the fused framework. The formula also confirms one atom of bromine, chlorine, and iodine alongside six carbons, two hydrogens, and three nitrogens. No separate counterion appears in the encoded graph. The public notation carries no explicit stereochemical layer. The graph is neutral.

Because several substitution patterns could retain the formula C6H2BrClIN3, the locanted name must be read with the explicit connection string. Within the SMILES, the ring closures describe the fused skeleton and the terminal halogen symbols mark their attachment points. CID 86662987 preserves that full record rather than a generic trihalogenated heterocycle. CAS 1263425-59-7 supplies the registry linkage, and CSFRKRKCGOHTJB-UHFFFAOYSA-N enables a separate structure-key comparison. Agreement across these values distinguishes the 8-bromo, 6-chloro, 3-iodo arrangement from another imidazopyridazine isomer.