Synonym: 5-Bromo-4-chloro-3-indolyl ß-D-galactoside, BCIG, X-Gal
CAS Number: 7240-90-6
Empirical Formula (Hill Notation): C14H15BrClNO6
Molecular Weight: 408.63
Beilstein Registry Number: 1402009
EC Number: 230-640-8
MDL Number: MFCD00005666
PubChem Substance ID: 24891761
Application
X-Gal is a chromogenic substrate for ß-galactosidase that produces a rich blue color that can easily be detected visually over background. X-Gal is the substrate of choice for blue-white selection of recombinant bacterial colonies with the lac+ genotype.