Mustard gas can cause bodily damage and has been used primarily as a chemical weapon, during combat in World War I and World War II, and during the Iran-Iraq war in the 1980s.
Mustard gas belongs to a class of organic compounds that include sulfur mustard (Yperite) and nitrogen mustard. Lewisite is an arsenic-containing agent in this class. As gases, these agents appear yellow-brown in color and smell like mustard, garlic, or horseradish. In pure form at room temperature, they are thick and almost-odorless liquids.
In the 1940s, the Department of Defense recruited "volunteer soldier" subjects for experiments using mustard agents to evaluate clothing, ointments and equipment to protect American troops from mustard agent attacks.
Since the early 1990s, VA has conducted outreach efforts to reach Veterans identified by the Department of Defense as participants in these tests and inform them about their benefits.
If you are concerned about health problems associated with exposure to mustard gas during your military service, talk to your health care provider or local VA Environmental Health Coordinator.
Veterans may file a claim for disability compensation for health problems they believe are related to exposure to mustard gas during military service. VA decides these claims on a case-by-case basis. File a claim online.
Learn more about VA benefits.