X-Gal; 5-bromo-4-chloro-3-indolyl-ß-D-galactopyranoside




General Description
Gal is a chromogenic substrate for β-galactosidase that produces a rich blue color that can easily be detected visually over background. It is soluble in dimethylformamide and methanol. The product is not soluble in water.


  • X-Gal has been used for immunohistocytochemistry applications.
  • It is also the substrate of choice for blue-white selection of recombinant bacterial colonies with the lac+ genotype.
CAS Number:                    7240-90-6
Molecular Formula:         C14H15BrClNO6
Molecular Weight:           408.63 g/mol
InChI Key:                          OPIFSICVWOWJMJ-AEOCFKNESA-N

Additional information


100 mg, 1 g