furametpyr
Fungicide
FRAC 7, C2; carboxamide
NOMENCLATURE
Common name furametpyr (BSI, pa E-ISO)
IUPAC name (RS)-5-chloro-N-(1,3-dihydro-1,1,3-trimethylisobenzofuran-4-yl)-1,3-dimethylpyrazole-4-carboxamide
Chemical Abstracts name 5-chloro-N-(1,3-dihydro-1,1,3-trimethyl-4-isobenzofuranyl)-1,3-dimethyl-1H-pyrazole-4-carboxamide
CAS RN [123572-88-3] Development codes S-82658; S-658 (both Sumitomo)
PHYSICAL CHEMISTRY
Mol. wt. 333.8 M.f. C17H20ClN3O2 Form Colourless or light brownish crystals. M.p. 150.2 °C V.p. 4.7 ´ 10-3 mPa (25 °C) KOW logP = 2.36 (25 °C) Henry 6.97 ´ 10-6 Pa m3 mol-1 (calc.) Solubility In water 225 mg/l (25 °C). Soluble in most organic solvents.
COMMERCIALISATION
History Discovered by Sumitomo Chemical Co., Ltd in 1989. Patents US 4877441; EP 315502 Manufacturers Sumitomo
APPLICATIONS
Biochemistry Inhibits mitochondrial succinate oxidation. Mode of action Preventative and curative fungicide with systemic and translaminar action. Uses Fungicide active on rice sheath blight on rice by foliar or submerged application. Formulation types GP; GR; WP. Selected products: 'Limber' (Sumitomo)
OTHER PRODUCTS
Mixtures: 'Fuji-One Applaud Limber' (+ isoprothiolane+ buprofezin) (Nihon Nohyaku)
MAMMALIAN TOXICOLOGY
Oral Acute oral LD50 for male rats 640, female rats 590 mg/kg. Skin and eye Acute dermal LD50 for male and female rats >2000 mg/kg. Slight eye irritant; not a skin irritant (rabbits). Slight skin sensitiser (guinea pigs).
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