4-Nitrophenyl β-D-xylopyranoside, 1g, is a widely used reagent in the biochemical analysis of xylanase and glycosidase activities. When hydrolyzed by these enzymes, it releases a p-nitrophenol group that can be detected using spectrophotometric methods. This compound is essential in studies focused on the breakdown of hemicellulose, particularly in biofuel production, where xylanases play a significant role in converting plant biomass into fermentable sugars. The 1g quantity is suitable for medium-scale experiments and is used in routine enzyme assays, carbohydrate metabolism studies, and biotechnological applications.