Toggle Nav


Catalog No.
Substrate for β-galactosidase,used in blue/white screening
Grouped product items
SizePriceStock Qty
In stock

Tel: +1-832-696-8203

Email: [email protected]

Worldwide Distributors


Substrate for β - Galactosidase which produces a rich blue color that can easily be detected visually over background. Substrate of choice for blue/white selection of recombinant bacterial colonies with the lac + genotype. dissolve in dimethylformamide (AB00450) or DMSO (AB00435) at 20mg/ml X-GAL (sizes 100mg, 250mg, 500mg, 1g) is supplied with a vial of freshly distilled DMF to ensure optimum color development store at -20°C

Chemical Properties

Physical AppearanceA crystalline solid
StorageStore at -20°C
Cas No.7240-90-6
Solubility≥109.4 mg/mL in DMSO, ≥3.7 mg/mL in EtOH with ultrasonic and warming,insoluble in H2O
Chemical Name(2S,3R,4S,5R,6R)-2-[(5-bromo-4-chloro-1H-indol-3-yl)oxy]-6-(hydroxymethyl)oxane-3,4,5-triol
SDFDownload SDF
Canonical SMILESC1=CC(=C(C2=C1NC=C2OC3C(C(C(C(O3)CO)O)O)O)Cl)Br
Shipping ConditionEvaluation sample solution : ship with blue ice.All other available size: ship with RT , or blue ice upon request
General tipsFor obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.

Quality Control