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MCPB (4-(2-Methyl-4-chlorophenoxy) butyric acid)

General Information

• Chemical Class: Phenoxy compound
• Uses: Registered for use on pea crops before flowering, for post-emergence control of broadleaf annual and perennial weeds including Canadian thistle, buttercup, mustard, purslane, ragweed, common lambsquarters, pigweed, smartweed, sowthistle, and morning glory.
• Alternatives: Organic Agriculture
• Beyond Pesticides rating: Toxic

Health Effects

• EPA Acute Toxicity Class: III (slightly toxic)
• Cancer: Possibly (3)
• Endocrine Disruption: Not documented
• Reproductive Effects: Not documented
• Neurotoxicity: Yes (8)
• Kidney/ Liver Damage: Yes (8)
• Sensitizer/ Irritant: Not documented
• Birth/ Developmental Defects: Not documented

Environmental Effects

• Detected in Groundwater: Not documented
• Detected in Streams: Not documented
• Potential Leacher: Not documented
• Toxic to Birds: Yes (8)
• Toxic to Fish/ Aquatic Organisms: Not documented
• Toxic to Bees: Not documented
• Toxic to Mammals: Not documented
• Long-Range Transport: Not documented

Additional Information

• Regulatory Information:
  • EPA Reregistration Eligibility Document (RED) signed (3/2006)
• Supporting information:
• PAN Pesticide Database – MCPB (Pesticide Action Network)