13-08606. Silvex [Archived]

Nomenclature

CAS number: 93-72-1
2-(2,4,5-Trichlorophenoxy)propanonic acid; fenoprop; 2,4,5-TP.
C9H7Cl3O3; mol wt 269.51.
C 40.11%, H 2.62%, Cl 39.46%, O 17.81%.

Description and references

Selective pre- and post-emergence herbicide. Prepn: Toothill et al., Ann. Appl. Biol. 44, 547 (1956). Toxicity: G. W. Bailey, J. W. White, Residue Rev. 10, 97 (1965).

Chemical structure

Properties

Crystals, mp 181.6°. Soly at 25° in water 0.014%; acetone 15.2%; benzene 0.16%; carbon tetrachloride 0.024%; ether 7.13%; heptane 0.017%; methanol 10.5%. LD50 orally in rats: 650 mg/kg (Bailey, White).

Derivative

Triethanolamine salt.

Nomenclature

CAS number: 17369-89-0
Silvexamine.
C9H7Cl3O3.C6H15NO3; mol wt 418.70.
C 43.03%, H 5.30%, Cl 25.40%, O 22.93%, N 3.35%.

Properties

Sol in water.

Derivative

Propylene glycol butyl ether ester.

Nomenclature

CAS number: 2317-24-0
Kuron (Dow).
C16H21Cl3O4; mol wt 383.69.
C 50.09%, H 5.52%, Cl 27.72%, O 16.68%.

Description and references

Prepn: Williams, US 2749360 (1956 to Dow).

Caution

Irritating to eyes, skin, mucous membranes.

Use

Formerly in the control of woody plants on uncropped land.

Status

This monograph has been retired and is no longer subject to revision or update.