Chemical Warfare Agent Exposure Limits

CDC recommends exposure limits for chemical warfare agents. These exposure limits protect workers and the general population. CDC periodically reviews these limits to see if new risk assessment methods and toxicity data suggest the need for revisions.

CDC originally recommended exposure limits in 1988.

• Nerve agent (GA, GB, and VX) exposure limits were revised in 2003.
• Sulfur mustard (H, HD) exposure limits were revised in 2004.
• Lewisite exposure limits have not changed. They are under review.