Flusilazole

Common name flusilazole (BSI, ANSI, draft E-ISO, (m) draft F-ISO)

IUPAC name bis(4-fluorophenyl)(methyl)(1H-1,2,4-triazol-1-ylmethyl)silane; 1-[[bis(4-fluorophenyl)(methyl)silyl]methyl]-1H-1,2,4-triazole 

Chemical Abstracts name 1-[[bis(4-fluorophenyl)methylsilyl]methyl]-1H-1,2,4-triazole 

CAS RN [85509-19-9]

PHYSICAL CHEMISTRY

Composition Tech. is 92.5%.  Mol. wt. 315.4  M.f. C16H15F2N3Si  Form White, odourless crystals.  M.p. 53-55 ºC  V.p. 3.9 ´ 10-2 mPa (25 ºC, gas saturation method)  KOW logP = 3.74 (pH 7, 25 ºC)  Henry 2.7 ´ 10-4 Pa m3 mol-1 (pH 8, 25 °C, calc.)  S.g./density 1.30  Solubility In water 45 (pH 7.8), 54 (pH 7.2), 900 (pH 1.1) (all in mg/l, 20 ºC). Readily soluble (>2 kg/l) in many organic solvents.  Stability Stable for more than 2 years under normal storage conditions. Stable to light, and to temperatures up to 310 ºC.  pKa 2.5, v. weak base 

APPLICATIONS

Biochemistry Inhibits ergosterol biosynthesis (steroid demethylation inhibitor).  

Mode of action Systemic fungicide with protective and curative action. Its resistance to wash-off, redistribution by rainfall and vapour phase activity are important components in its biological activity. 

Uses Broad spectrum, systemic, preventive and curative fungicide effective against many pathogens (Ascomycetes, Basidiomycetes and Deuteromycetes). It is recommended for use on many crops, such as: apples (Venturia inaequalis,Podosphaera leucotricha); peaches (Sphaerotheca pannosa, Monilia laxa); cereals (all major diseases); grapes (Uncinula necator, Guignardia bidwellii); sugar beet (Cercospora beticola, Erysiphe betae); maize (Helminthosporium turcicum); sunflowers (Phomopsis helianthi); oilseed rape (Pseudocercosporella capsellae, Pyrenopeziza brassicae); bananas (Mycosphaerella spp.).