Methacrolein-DNPH, as methacrolein, is primarily used in environmental and analytical chemistry for the detection and quantification of methacrolein in various samples. It is commonly employed in air quality monitoring to measure methacrolein levels, which is an important marker for assessing air pollution, particularly in urban and industrial areas. The compound is also utilized in laboratory research to study the behavior and effects of methacrolein in atmospheric chemistry, including its role in the formation of secondary organic aerosols. Additionally, it finds application in occupational health studies to evaluate exposure risks in workplaces where methacrolein may be present, ensuring compliance with safety standards.