Amodiaquine-d10, a deuterated form of amodiaquine, is primarily used in research and development within the pharmaceutical and analytical chemistry fields. Its application is focused on serving as an internal standard in mass spectrometry and other analytical techniques. By incorporating deuterium atoms, it provides a stable and non-radioactive isotopic label, which enhances the accuracy and precision of quantitative analyses. This is particularly useful in pharmacokinetic studies, where it helps track the distribution, metabolism, and excretion of amodiaquine in biological systems. Additionally, it aids in the development of sensitive and reliable methods for detecting and measuring amodiaquine and its metabolites in complex matrices such as blood, plasma, or urine. Its use ensures robust data quality in studies aimed at understanding drug behavior and optimizing therapeutic efficacy.