Cinnoline

Cinnoline
Names
	Preferred IUPAC name Cinnoline
	Other names Benzopyridazine
Identifiers
CAS Number	253-66-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:36617 ;
ChEMBL	ChEMBL479792 ;
ChemSpider	8853 ;
ECHA InfoCard	100.005.423
EC Number	205-964-8;
Gmelin Reference	1126565
PubChem CID	9208;
UNII	N5KD6I506O ;
CompTox Dashboard (EPA)	DTXSID60179943 ;
	InChI InChI=1S/C8H6N2/c1-2-4-8-7(3-1)5-6-9-10-8/h1-6H Key: WCZVZNOTHYJIEI-UHFFFAOYSA-N ; InChI=1/C8H6N2/c1-2-4-8-7(3-1)5-6-9-10-8/h1-6H Key: WCZVZNOTHYJIEI-UHFFFAOYAA;
	SMILES n1nccc2ccccc12;
Properties
Chemical formula	C8H6N2
Molar mass	130.150 g·mol−1
Melting point	39 °C (102 °F; 312 K)
Acidity (pKa)	2.64
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Cinnoline is an aromatic heterocyclic compound with the formula C₈H₆N₂. It is isomeric with other naphthyridines including quinoxaline, phthalazine and quinazoline. Neither the unsubstituted heterocycle nor any derivatives is known to occur naturally.