Common Name: Diflufenican

Chemical name: N-(2,4-difluorophenyl)-2-[(3-trifluoromethyl)phenoxy]                                                               nicotinanilide

Physical appearance:      off-white to white crystalline powder

Cas Nº:   83164-33-4

Empirical formula:  C₁₆H₁₁F₅N₂O₂

Structural formula:

Molecular weight: 394.3

Activity: anilide herbicide, pyridine herbicide

 

-       Identity: Diflufenican (ISO)

-       Physical state: colour, appearance, odour, etc.:

Diflufenican is off-white to white crystalline powder, odourless.

-       Melting, boiling and descomposition point.:

        Melting point: 162.5℃

        Boiling point: not available.

        Decomposition point:  not available.

-       Vapour pressure: 7.07×10^-5Pa(30℃)

-       Solubility in water and other solvents: (25℃): acetone: 100g/L; DMF: 100g/L;

xylene:  20g/L; cyclohexane: 10g/L; Water: 0.05mg/L.

-       Coefficient of partition between water and an appropriate non-miscible solvent.:

     Octanol/Water: Log Pow=4.2

-       Flammability.: Diflufenican technical material if of crystalline powder, it’s inflammable

at normal conditions.

-       Explosive and corrosive properties:  Diflufenican technical material is of crylstalline

powder form, it’s not explosive and corrosive at normal conditions.

-       Specific gravity: 1.15g/cm³, 25℃

-       Hidrolysis measure:

Diflufenican is highly persistent in the soil with dissipation DT₅₀ values of 311 to 733

 days, as well as in the water body with little hydrolysis over a range of pH levels at 22℃.

This could lead to prolonged contamination of water due to run-off of soil containing

residues and through direct contamination of water by over-spray or spray drift.

-       Photolysis measure:

Diflufenican is of Soil DT₅₀ 15 to 30 weeks. Stable to hydrolysis (25℃) at pH 5, pH 7

 and pH 9. Fairly stable to photolysis.

-       Absorption spectrum: not available.

-       Storage stability: Diflufenican is stable at normal conditions, it is stable for at least 24

month since production at original sealed package in low temperature area.

Application: Diflufenican blocks carotenoid biosynthesis, by inhibition of phytoene desaturase. Mode of action Selective contact and residual herbicide, absorbed principally by the shoots of germinating seedlings, with limited translocation. Uses Applied at 125-250 g/ha pre- or early post-emergence in autumn-sown wheat and barley, to control grass and broad-leaved weeds, particularly Galium, Veronica and Viola spp. Normally used in combination with isoproturon or other cereal herbicides. Phytotoxicity Any slight phytotoxicity is in the form of small transient patches on basal leaves, with no adverse effect on crop development. Formulation types SC; WP. Selected tradenames: 'Fenican' (Aventis); 'Tigrex' (Aventis); mixtures: 'Bacara' ( flurtamone) (Aventis); 'Javelin' ( isoproturon) (Aventis).