a heterocyclic compound consisting of a benzene ring condensed with a pyridine ring. It is a colourless, oily liquid, mp -19.5 °C, bp 240°C, relative density 1.08, of characteristic odour, insoluble i, benso(b)püridiin, C9H7N, iseloomuliku lõhnaga värvuseta mürgine vedelik, st° -16 °C, kt° 238 °C. K. on aluseliste omadustega, benseeni- ja püridiinituuma kaudu reageerides annab rohkesti derivaate. K-