Mecoprop
Mecoprop is a common general use herbicide found in many household weed killers and "weed-and-feed" type lawn fertilizers. It is primarily used to control broadleaf weeds. 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.
Mecoprop is a mixture of two stereoisomers, with the --enantiomer possessing the herbicidal activity.