Butyraldehyde 2,4-Dinitrophenylhydrazone is a specific derivative formed from butyraldehyde and 2,4-dinitrophenylhydrazine. It is primarily used as an analytical standard and reference compound in chromatography (e.g., HPLC) and spectrophotometric methods for the identification and quantification of carbonyl compounds, such as aldehydes and ketones, in environmental, food, and pharmaceutical samples. This compound aids in calibration and validation of analytical procedures due to its characteristic UV absorbance and stability. It is valuable in quality control, research, and regulatory compliance testing for trace carbonyl analysis.