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Exposure to Mustard Gas or Lewisite

If you were exposed to mustard gas (also known as sulfur mustard, yperite, or nitrogen mustard) or lewisite (an organic compound containing arsenic), you may have certain related long-term diseases or disabilities.

Are you eligible for compensation?

Yes, if:

  • You have a disability related to mustard gas or lewisite exposure.
  • Your military record shows you were exposed to mustard gas:
    • During field or chamber testing, or
    • During service on the battlefield in World War I, or
    • At the German air raid on the harbor of Bari, Italy, in World War II, or
    • While demolishing or handling explosive ordinance during Operation Iraqi Freedom, or
    • In the manufacturing and handling of vesicant (blistering) agents during military service.

Who is covered


Available benefits

  • Compensation
  • Health care

How it works

Because “exposure” to mustard gas or lewisite is not a service condition, you must claim the disease or condition that is related to the exposure. You should present any military records showing exposure to blistering agents with your claim.