Skip to Content

This site is a work in progress. If you don’t find what you need, visit

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.


Give feedback on this page

Please note: Content on this Web page is for informational purposes only. It is not intended to provide legal advice or to be a comprehensive statement or analysis of applicable statutes, regulations, and case law governing this topic. Rather, it’s a plain-language summary. If you are seeking claims assistance, your local VA regional office, a VA-recognized Veterans Service Organization, or a VA-accredited attorney or agent can help. Search Accredited Attorneys, Claims Agents, or Veterans Service Organizations (VSO) Representatives.