Nitrogen mustard compounds are a class of chemical agents known for their alkylating properties, making them effective as both therapeutic and toxicological substances. These compounds contain nitrogen atoms that can form covalent bonds with DNA, thereby interfering with cellular replication processes. Widely researched in the context of cancer treatment, nitrogen mustards can induce cross-links between DNA strands or directly damage DNA, leading to cell death. Clinically, they are used in combination therapies for various cancers due to their ability to target rapidly dividing cells. However, these compounds also exhibit significant toxicity towards normal tissues, necessitating careful dosing and monitoring. Research into their mechanisms continues to advance our understanding of their therapeutic potential while highlighting the need for safer alternatives.