3-Bromopropionic-2,2,3,3-d4 Acid is the labeled analog of 3-Bromopropionic acid (B687705). 3-Bromopropionic Acid is used as a reagent in the synthesis of nitrogen containing diselenides which exhibit antioxidant activity. Also used as a reagent in the synthesis of indolin-2-one-based multi-targeted receptor tyrosine kinase inhibitors as potential anticancer agents.