Acetylcysteine-d3 is the deuterated form of Acetylcysteine. Acetylcysteine (N-Acetylcysteine), a mucolytic agent, is utilized to decrease mucus viscosity. It functions as an ROS inhibitor and serves as a precursor to cysteine. By neutralizing the toxic lipids produced via arachidonic acid-dependent 5-lipoxygenase activity, it helps prevent ferroptosis induced by heme. Furthermore, Acetylcysteine can trigger apoptosis and exhibits antiviral activity against influenza viruses. It represents the most stable form of cysteine for drug delivery, suitable for disulfidptosis research.