Chemical Warfare Agent Exposure Limits

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

• Nerve agent (GA, GB, and VX) exposure limits [PDF – 242] were revised in 2003.
• Sulfur mustard (H, HD) exposure limits [PDF – 128] were revised in 2004.
• Lewisite exposure limits [PDF – 48 MB] were developed in 1988 and are under review.

Additional Resources

• Chemical Fact Sheets (cdc.gov)
• Nerve agents (GA, GB, and VX) (cdc.gov)
• Sulfur mustard (H, HD) (cdc.gov)
• Lewisite (L1, L2, and L3) (cdc.gov)