MCPB

MCPB, 2,4-MCPB, 4-(4-chloro-o-tolyloxy)butyric acid (IUPAC), or 4-(4-chloro-2-methylphenoxy)butanoic acid (CAS) is a phenoxybutyric herbicide. In the United States it is 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. It has low to moderate acute toxicity, with kidney and liver effects as the main hazard concerns. It is not volatile, persistent, or likely to bioconcentrate.

MCPB
Names
IUPAC name
4-(4-Chloro-2-methylphenoxy)butanoic acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.002.151
UNII
Properties
C11H13ClO3
Molar mass 228.67 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

A variety of methods have been developed for its analysis.[1] In the U.S., the maximum residue permitted on peas is 0.1 parts per million.[2]

References

  1. Wells, M. J. M.; Yu, L. Z. (2000). "Solid-phase extraction of acidic herbicides". Journal of Chromatography A. 885 (1–2): 237–250. doi:10.1016/S0021-9673(00)00206-5.CS1 maint: uses authors parameter (link)
  2. "RED FACTS; MCPB". US EPA.
  • MCPB in the Pesticide Properties DataBase (PPDB)
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