Fosetyl-aluminium

TC & FORMULATION: 95%TC, 40%WP, 80%WP, 90%SP

Structure Formula

NOMENCLATURE

fosetyl-aluminium

Common name fosetyl-aluminium

IUPAC name aluminium tris-O-ethylphosphonate 

Other names efosite-Al* (rejected common name proposal); EPAL                     CAS RN [39148-24-8]  EEC no. 254-320-2 

PHYSICAL CHEMISTRY

fosetyl-aluminium

Composition Tech. is ³95% pure.  Mol. wt. 354.1  M.f. C6H18AlO9P3  Form Colourless powder; (tech. is a white to yellowish powder).  M.p. 215 °C  V.p. <10-4 mPa (25 °C)  KOW logP = -2.1 to -2.7 (23 °C)  Henry <3.24 ´ 10-5 Pa m3 mol-1 (20 °C, calc.)  Solubility In water 111.3 g/l (pH 6, 20 ºC). In methanol 920, acetone 13, ethyl acetate <1 (all in mg/l, 20 ºC).  Stability Hydrolysis of fosetyl-aluminium occurs under extreme acid or alkaline conditions. DT50 5 d (pH 3), 13.4 d (pH 13). Decomposes above 276 ºC. Photostability DT50 23 daylight hours.  pKa 4.7 (20-25 °C) 

APPLICATIONS

fosetyl-aluminium

Biochemistry Acts by inhibiting germination of spores or by blocking development of mycelium and sporulation.  Mode of action Systemic fungicide, rapidly absorbed through the plant leaves or roots, with translocation both acropetally and basipetally.  Uses Control of diseases caused by e.g. Phytophthora, Pythium, Plasmopara, Bremia spp., etc. on a variety of crops including vines, fruit (citrus, pineapples, avocados, stone fruit and pome fruit), berries, vegetables, hops, ornamentals and turf. Application rates range from 1-7 kg/ha in citrus, 2 kg/ha in tree nuts, up to 3.6 kg/ha in pome fruit, 2 kg/ha in grapes and 2.4-4.5 kg/ha in cucumber. Also useful activity against several bacterial plant pathogens. Formulation types WG; WP.  Compatibility Incompatible with foliar fertilisers.

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