BODIPY is the technical common name of a chemical compound with formula C9H7BN2F2, whose molecule consists of a boron difluoride group BF2 joined to a dipyrromethene group C9H7N2; specifically, the compound 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene in the IUPAC nomenclature. The common name is an abbreviation for "boron-dipyrromethene". It is a red crystalline solid, stable at ambient temperature, soluble in methanol.
The compound itself was isolated only in 2009, but many derivatives—formally obtained by replacing one or more hydrogen atoms by other functional groups—have been known since 1968, and comprise the important class of BODIPY dyes. These organoboron compounds have attracted much interest as fluorescent dyes and markers in biological research.