A useful β-galactosidase substrate
Catalog #: 2671 | abID:

Product Details

Alternate Name 5-Bromo-4-chloro-3-indolyl β-D-galactoside, BCIG
Appearance White powder
CAS # 7240-90-6
Molecular Formula C₁₄H₁₅BrClNO₆
Molecular Weight 408.63
Purity ≥98%
Solubility DMF or DMSO (~40 mg/ml)
InChi InChI=1S/C14H15BrClNO6/c15-5-1-2-6-9(10(5)16)7(3-17-6)22-14-13(21)12(20)11(19)8(4-18)23-14/h1-3,8,11-14,17-21H,4H2/t8-,11+,12+,13-,14-/m1/s1
PubChem CID 65181
MDL Number MFCD00005666
Handling Protect from air and light
Storage Conditions -20°C
Shipping Conditions Gel Pack
USAGE For Research Use Only! Not For Use in Humans.


X-GAL is a useful chromogenic substrate for β-galactosidase that produces a rich blue color that can easily be detected visually over background. X-GAL is used to indicate whether a cell expresses the ß-glactosidase enzyme, which is encoded by the lacZ gene, in a technique called blue white screening.

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