[(4-amino-3,5-dichloro-6-fluoro-2-pyridinyl)oxy]acetic acid

4-amino-3,5-dichloro-6-fluoro-2-pyridyloxyacetic acid

C₇H₅Cl₂FN₂O₃

Form White, crystalline solid.

Melting point 232-233℃.

Density 1.09 (24℃).

Solubility In water 5700 (pH 5.0), 7300 (pH 9.2) (both mg/l, 20℃) . In acetone 51.0, methanol 34.6, ethyl acetate 10.6, isopropanol 9.2, dichloromethane 0.1, toluene 0.8, xylene 0.3 (all in g/l, 20℃).

Oral Acute oral LD50 for rats 2405 mg/kg.

Skin and eye Acute percutaneous LD50 for rabbits >5000 mg/kg.

Mild eye irritant; non-irritating to skin (rabbits).

Inhalation LC50 (4 h) for rats >0.296 mg/l air.

Fluroxypyr is effective by post-emergence foliar application, controlling a range of economically important broad-leaved weeds (including Galium aparine and Kochia spp.) in all small grain crops, and Rumex spp. and Urtica dioica in pastures. Directed applications are used against herbaceous and woody broad-leaved weeds in orchards (apple only) and plantation crops (rubber and oilpalm), and broad-leaved brush spp. in conifer forests. Post-emergence, broadcast applications of fluroxypyr in maize up to the 6-leaf stage of the crop are used for control of Calystegia sepium, Convolvulus arvensis and Solanum nigrum. The meptyl and 2-butoxy-1-methylethyl esters have similar activity, the advantage of the latter being the wider range of formulation options that are available.

Description: White solid, free from visible extraneous matter;

Active Ingredient Content(w/w): ≥95%;

Water (w/w): ≤0.5%; Acidity (as H2SO4)(w/w): ≤0.5%;

Acetone Insoluble Material(w/w): ≤0.3%