X GlcA Sodium Salt [5 Bromo 4 Chloro 3 indolyl β-D-glucuronic acid, sodium salt trihydrate], 500 mg is a chromogenic substrate used for detecting β-glucuronidase enzyme activity. This substrate is hydrolyzed by the enzyme to produce a blue-colored product, making it an effective tool for enzyme assays and microbial diagnostics. X GlcA Sodium Salt is widely used in biochemical research, particularly for identifying microorganisms that can hydrolyze glucuronic acid. It is frequently employed in gene expression studies, microbial screening, and enzymatic assays where β-glucuronidase activity serves as an indicator of specific metabolic pathways or genetic modifications.