使用Indoxyl beta-D-Glucuronide Cyclohexylammonium Salt is a chromogenic substrate for β-D-glucuronidase, employed in the detection and enumeration of E. coli, which yields a blue precipitate upon cleavage. Indoxyl beta-D-Glucuronide Cyclohexylammonium Salt can be used in biological use and study of isolated peptide and its preparation method for medicinal uses.