17β-Estradiol-2,4,16,16,17-d5 (CAS 221093-45-4)

17β-Estradiol-2,4,16,16,17-d5 is utilized in analytical chemistry as a deuterated internal standard for mass spectrometry and other sensitive detection methods. This stable isotope-labeled form of 17β-estradiol allows for precise quantification of the hormone in various biological and environmental samples by compensating for sample losses and variations in analytical response. In endocrinology research, it is used to study the metabolism and chemical kinetics of estrogens. The deuterium labeling of 17β-estradiol-2,4,16,16,17-d5 provides a distinct mass difference that aids in distinguishing the labeled compound from its unlabeled counterpart during analysis. Additionally, this compound is essential in tracing studies that explore the mechanisms of estrogen action at the molecular level, including receptor binding and gene expression. It is also employed in environmental studies to monitor the presence and fate of estrogenic substances in water systems and to assess their impact on wildlife and ecosystems.