Used in biosensors for detecting ethanol in clinical, industrial, and food samples. Enables rapid and selective measurement of alcohol content in blood, beverages, and fermentation processes. Commonly employed in diagnostic kits for breathalyzer systems and alcohol metabolism studies. Also applied in enzymatic fuel cells and bioelectrochemical devices where ethanol serves as a substrate for energy generation. The freeze-dried form ensures stability and ease of storage, allowing for convenient reconstitution and integration into assay systems.