Fenoprop, also called 2,4,5-TP, is the organic compound 2-(2,4,5-trichlorophenoxy)propionic acid.

[2] It is a phenoxy herbicide and a plant growth regulator, an analog of 2,4,5-T in which the latter's acetic acid sidechain is replaced with a propionate group (with an extra CH3).

The addition of this extra methyl group creates a chiral centre in the molecule and useful biological activity is found only in the (2R)-isomer.

[3] The compound's mechanism of action is to mimic the auxin growth hormone indoleacetic acid (IAA).

According to the Environmental Protection Agency its greatest use was as a postemergence herbicide for control of woody plants, and broadleaf herbaceous weeds in rice and bluegrass turf, in sugarcane, in rangeland improvement programs and on lawns.