Azomethine-H hydrate is widely used as a sensitive reagent in analytical chemistry for the spectrophotometric determination of boron. It forms a colored complex with boron, which can be measured to determine boron concentrations in various samples, including water, soil, and plant materials. This application is particularly valuable in agriculture for monitoring boron levels, which are crucial for plant growth and development. Additionally, it is employed in environmental studies to assess boron contamination in water sources, ensuring compliance with safety standards. Its high sensitivity and selectivity make it a preferred choice for precise boron analysis in both research and industrial settings.