Diflubenzuron 25%SC

20L/DRUM

Common name diflubenzuron (BSI, E-ISO, (m) F-ISO, ANSI, ESA) 

IUPAC name 1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl)urea
Chemical Abstracts name N-[[(4-chlorophenyl)amino]carbonyl]-2,6-difluorobenzamide  Other names DFB; difluron CAS RN [35367–38–5]  

EC no. 252–529–3 

PHYSICAL CHEMISTRY
Composition Tech. grade diflubenzuron is ≥95% pure. Mol. wt. 310.7 M.f. C₁₄H₉ClF₂N₂O₂  Form Colourless crystals; (tech., off-white to yellow crystals).  M.p. 223.5–224.5 °C  B.p. 257 °C/40.0 kPa (tech.) V.p. 1.2 × 10^-4 mPa (25 °C) (gas saturation method) K_ow logP = 3.8 (pH 4), 4.0 (pH 8), 3.4 (pH 10) Henry ≤4.7 × 10^-4 Pa m³ mol^-1 (calc.) S.g./density 1.57 (20 °C) Solubility In water 0.08 mg/l (pH 7, 25 °C). In n-hexane 0.063, toluene 0.29, dichloromethane 1.8, acetone 6.98, ethyl acetate 4.26, methanol 1.1 (all in g/l, 20 °C). Stability Light-sensitive when in solution, but stable to sunlight as a solid.<0.5% decomposition after 1 d storage at 100 °C; <0.5% after 7 d at 50 °C. In aqueous solution (20 °C), stable at pH 5 and 7 (DT₅₀ >180 d); at pH 9, DT₅₀ 32.5 d.