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Common name folpet (BSI, draft E-ISO, (m) draft F-ISO, ANSI, JMAF); folpel ((m) France)
IUPAC name N-(trichloromethylthio)phthalimide; N-(trichloromethanesulfenyl)phthalimide
Chemical Abstracts name 2-[(trichloromethyl)thio]-1H-isoindole-1,3(2H)-dione
CAS RN [133-07-3]
PHYSICAL CHEMISTRY
Composition Tech. is 92-95%. Mol. wt. 296.6 M.f. C9H4Cl3NO2S Form Colourless crystals; (tech., yellow powder). M.p. 177 ºC (decomp.) V.p. 2.1 ´ 10-2 mPa (25 °C) KOW logP = 3.11 Henry 7.8 ´ 10-3 Pa m3 mol-1 (calc.) S.g./density 1.72 (20 °C) Solubility In water 0.8 mg/l (room temperature). In carbon tetrachloride 6, toluene 26, methanol 3 (all in g/l, 25 °C). Stability Stable in the dry state. Slowly hydrolysed by moisture at room temperature. Rapidly hydrolysed in concentrated alkalis, and at elevated temperatures. F.p. Not flammable (EEC A10)
APPLICATIONS
Biochemistry Non-specific thiol reactant, inhibiting respiration.
Mode of action Foliar fungicide with protective action.
Uses Control of downy mildews, powdery mildews, leaf spot diseases, scab, excoriosis, black rot, white rot, Gloeosporium rots, Botrytis, Alternaria, Pythium, and Rhizoctonia spp. in pome fruit, stone fruit, soft fruit, citrus fruit, vines, olives, hops, potatoes, lettuce, cucurbits, onions, leeks, celery, tomatoes and ornamentals.
Phytotoxicity Non-phytotoxic, except to sweet cherries and the D'Anjou variety of pears. Russetting is possible in sensitive apple varieties, if applied early in cropping.