806 4-(4-Chloro-2-methylphenoxy)butanoic acid 4-(4-Chloro-2-methylphenoxy)butanoic acid (MCPB, 2,4-MCPB) 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. 94-81-5 7207 C11H13ClO3 228.055320 White powder. 100°C 0.048 mg/mL at 25°C [YALKOWSKY,SH & DANNENFELSER,RM (1992)] No indication of carcinogenicity to humans (not listed by IARC). MCPB is a phenoxy herbicide produced as a sodium salt and an acid. MCPB 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. (L2155) Kidney and liver effects are the most prevalent hazard concerns for MCPB (L2155). Treatment may include washing any areas of contact, GI decontamination if swallowed, administering an IV and forced alkaline diuresis. (L346) 2009-06-02T22:28:28Z 2026-03-27T02:04:54Z C18529 C008418 4-(4-Chloro-2-methylphenoxy)butanoic acid 6482 true CC1=CC(Cl)=CC=C1OCCCC(O)=O C11H13ClO3 InChI=1S/C11H13ClO3/c1-8-7-9(12)4-5-10(8)15-6-2-3-11(13)14/h4-5,7H,2-3,6H2,1H3,(H,13,14) LLWADFLAOKUBDR-UHFFFAOYSA-N 228.672 228.055321989 Exogenous Solid 6938 CHEM000718 DTXSID4024193 46.53 57.90620000000001 23.396356187364226 5 3 1 4.061584320631802 -4.838116687030869 -1 1 2.75 -3.12 1.73e-01 g/l