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MSMA (Monosodium methanearsonate)

General Information

• MSMA product names
• Chemical Class: Arsenical herbicide
• Uses: No registered uses historically used in cotton production
• Alternatives: Agriculture
• Beyond Pesticides rating: Toxic

Health Effects

• Cancer: Possible (23)
• Endocrine Disruption: Not documented
• Reproductive Effects: Yes (23)
• Neurotoxicity: Not documented
• Kidney/ Liver Damage:Yes (23)
• Sensitizer/ Irritant: Not documented
• Birth/ Developmental Defects: Not documented

Environmental Effects

• Detected in Groundwater: Not documented
• Detected in Streams: Not documented
• Potential Leacher: Yes (27)
• Toxic to Birds: Yes (23)
• Toxic to Fish/ Aquatic Organisms: Yes (23)
• Toxic to Bees: Yes (23)
• Toxic to Mammals: Not documented
• Long-Range Transport: Not documented

Additional Information

• Regulatory Information:
  • EPA Reregistration Eligibility Decision (RED) signed (8/2006) (all uses cancelled)
• Supporting information:
  • PAN Pesticides Database:MSMA (Pesticide Action Network)
• Key Studies: