Picolinafen

Picolinafen

氟吡酰草胺

4′-fluoro-6-(α,α,α-trifluoro-m-tolyloxy)pyridine-2-carboxanilide

N-(4-fluorophenyl)-6-[3-(trifluoromethyl)phenoxy]-2-pyridinecarboxamide

137641-05-5

C₁₉H₁₂F₄N₂O₂

Herbicides > Pyridine herbicides
Herbicides > Anilide herbicides
Herbicides > Amide herbicides

Herbicide

Pendimethalin+picolinafen
Premix Parters: phosalone;

Molecular weight:376.3; Physical form:White, finely crystalline solid, with a musty, phenolic odour. Density:1.45; Melting point:107.2-107.6 °C; Flash point:>180 °C; Vapour pressure:1.66 × 10-7 mPa ( est., 20 °C); Henry constant:1.6 × 10-3 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 5.37; Solubility:In water 3.9 × 10-5 g/l (distilled water, 20 °C); 4.7 × 10-5 g/l ( pH 7, 20 °C). In acetone 55.7, dichloromethane 76.4, ethyl acetate 46.4, methanol 3.04 (all in g/100 ml).; Stability:Stable to hydrolysis at pH 4, 7 and 9 over 5 d (50 °C). Photodegradation DT50 24.8 d ( pH 5), 31.4 d ( pH 7), 22.6 d ( pH 9).

percutaneous LD₅₀ for male and female rats >4000 mg/kg. Non-irritating to skin and eyes (rabbits); not a skin sensitiser (guinea pigs). Inhalation: LC₅₀ (4 h) for male and female rats >5.9 mg/l. ADI:0.2 mg/ kg.

Ecotoxicology:
 Algae: EC₅₀ for Anabaena 0.12 mg/l.Bees: LD₅₀ (oral and dermal) >200µg/bee.Birds:Acute oral LD₅₀ for bobwhite quail and mallard ducks >2250 mg/kg. Dietary LC₅₀ for bobwhite quail and mallard ducks >5314 ppm in diet.Daphnia: EC₅₀ (48 h) 0.612 mg/l.Fish: LC₅₀ (96 h) for rainbow trout 0.281, bluegill sunfish >0.57 mg/l.Worms: LC₅₀ (14 d) for earthworms >1000 mg/ kg. 

Environmental fate: 
Animals:Rapidly metabolised by hydrolytic cleavage of the amide bond, to yield the substituted picolinic acid and p-fluoroaniline.Soil:Hydrolytically stable, but photochemically degraded, DT₅₀ 23-31 d. Average field DT₅₀ 1 mo, DT₉₀ <4 mo. Bound to soil, K_oc (four soil types) 17 1Plant:Slowly metabolised in wheat with little translocation of parent or metabolites. Metabolism proceeds via cleavage of the amide bond. WATER SOLUBILITY: 0.000039 g/l at 20° C

Hazard Class:O (Obsolete as pesticide, not classified)