This compound is primarily used as a labeled internal standard in analytical chemistry, particularly in mass spectrometry and nuclear magnetic resonance (NMR) spectroscopy. Its deuterium-labeled structure allows for precise tracking and quantification of similar non-labeled compounds in complex mixtures, aiding in accurate metabolic profiling and pharmacokinetic studies. Additionally, it serves as a valuable tool in research involving the synthesis and analysis of benzoic acid derivatives, ensuring high precision in experimental results. Its application is crucial in fields like pharmaceuticals, where understanding drug metabolism and stability is essential.