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IUPAC name
(RS)-2-(4-Chloro-2-methylphenoxy)propanoic acid
93-65-2 YesY
3D model (Jmol) Interactive image
ChEMBL ChEMBL2145254 N
ChemSpider 6886 N
ECHA InfoCard 100.002.060
EC Number 230-386-8
KEGG C18742 YesY
PubChem 7153
Molar mass 214.65 g·mol−1
Appearance Solid
Melting point 94 to 95 °C (201 to 203 °F; 367 to 368 K) [2]
Boiling point decomposes [2]
900 mg/L(20 °C) [2]
Main hazards Xn, N [2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Mecoprop, or methylchlorophenoxypropionic acid (MCPP), is a common general use herbicide found in many household weed killers and "weed-and-feed" type lawn fertilizers.[3] It is primarily used to control broadleaf weeds.[4] It is often used in combination with other chemically related herbicides such as 2,4-D, dicamba, and MCPA.

The United States Environmental Protection Agency has classified mecoprop as toxicity class III - slightly toxic.[4]

Mecoprop is a mixture of two stereoisomers, with the (R)-(+)-enantiomer ("Mecoprop-P", "Duplosan KV") possessing the herbicidal activity.[5]

Structures of the two enantiomeric forms (S left, R right) of mecoprop

See also[edit]


  1. ^ Merck Index, 11th Edition, 5666.
  2. ^ a b c d Record of Mecoprop in the GESTIS Substance Database of the IFA, accessed on 8 September 2008
  3. ^ Record in the Household Products Database of NLM
  4. ^ a b Mecoprop at EXTOXNET
  5. ^ G. Smith; C. H. L. Kennard; A. H. White; P. G. Hodgson (April 1980). "(±)-2-(4-Chloro-2-methylphenoxy)propionic acid (mecoprop)". Acta Crystallogr. B. 36 (4): 992–994. doi:10.1107/S0567740880005134. 

External links[edit]