Cyhalofop-butyl

Common name:

Cyhalofop-butyl;

IPUAC name:

butyl (R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propionate;

Chemical Abstracts name:

butyl (2R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propanoate;

Cas RN:

122008-85-9;

Development codes:

DE-537;

PHYSICAL CHEMISTRY

Molecule weight:

357.39;

Molecule frame:

C20H20FNO4;

Form:

Light yellow homogeneous liquid;

Melt point：

5.5-49.5℃;

Vapour pressure：

5.3 X 10-5 pa (25 ℃);

Kow:

LogP= 3.3158 at 25 °C;

Henry:

2.79? 10-4 Pa m3 mol-1 (calc. ) ;

S.g/density:

1.17g/cm3;

Solubility:

0.7mg/L in water;43.7% in xylene

Stability:

Stable at pH 4, hydrolysed slowly at pH 7.

APPLICATIONS

Post-emergence herbicide with foliar uptake only and no soil activity. A systemic herbicide that is readily absorbed by plant tissue, is moderately phloem-mobile and accumulates in meristematic regions. Grass weeds cease growth immediately after treatment, with yellow patches appearing within 2-3 days to one week, leading to necrosis and death of the whole plant within 2 to 3 weeks. For post-emergence control of grass weeds in rice. Applied at 75-100 g/ha in tropical rice and 180-310 g/ha in temperate rice. For selectivity in Poaceae species.

Formulation types:

10%EC.