Used as a chromogenic substrate in enzymatic assays, particularly for studying protease activity. The compound releases p-nitroaniline upon cleavage by specific enzymes, producing a yellow color that can be measured spectrophotometrically. This allows for real-time monitoring of enzyme kinetics and inhibition. Commonly employed in research settings to evaluate serine proteases and other peptidases. Its design enables high sensitivity and specificity in detecting enzymatic hydrolysis.