SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 43121433
CASRN 43121-43-3
SynonymsTriadimefon
2-Butanone, 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1H-1,2,4-triazol-1-yl)-
Bayleton
Amiral
Rofon
1-(4-chlorophenoxy)-3,3-dimethyl-1-(1H-1,2,4-triazolyl)-2-butanone
Analytical Method EPA Method 633
Molecular FormulaC14H16ClN3O2

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use Active against mildews and rusts of grains, fruits, vegetables and ornamentals. Experimental systemic fungicide used for control of wheat leaf rust. Control of powdery mildews in cereals, pome fruit, stone fruit, berry fruit, vines, hops, cucurbits, tomatoes, vegetables, sugar beet, mangoes, ornamentals, turf, flowers, shrubs, and trees; rusts in cereals, pines, coffee, seed grasses, turf, flowers, shrubs, and trees; Monilinia species in stone fruit; black rot of grapes; leaf blotch, leaf spot, and snow mould in cereals; pineapple disease butt rot in pineapples and sugar cane; leaf spots and flower blights in flowers, shrubs, and trees; and many diseases of turf. Triadimefon with carbendazim and sodium alginate is used to protect pruning wounds on apple and pear trees.
Apparent Color Colorless crystals; Colorless solid; White to tan crystals
Melting Point 82 deg C
Molecular Weight 293.75
Density 1.22 at 20 deg C
Environmental Impact Triadimefon's use as a systemic fungicide releases the compound directly to the environment through applications in dusts, emulsifiable concentrates, sprays and other routes of application. If released to the atmosphere, triadimefon will degrade rapidly in the vapor-phase by reaction with photochemically produced hydroxyl radicals (estimated half-life of about 14 hr). Particulate phase triadimefon and aerosols released to air during applications of triadimefon fungicides will be removed from air physically by dry and wet deposition. If released to soil or water, triadimefon may undergo biodegradation. Soil fungi have been shown to metabolize triadimefon to triadimenol; however, the relative importance of biodegradation as a fate process in the environment is uncertain. Field and soil-water partitioning studies indicate that triadimefon has low mobility in soil. The US Dept of Agric's Pesticide Properties Database lists a soil half-life of 26 days. Field studies have found soil half-lives ranging from 10 days to 7 months. In water, some hydrolysis may occur through a catalytic action involving divalent cations. Occupational exposure occurs through dermal contact, especially to workers using the compound as a fungicide. Since triadimefon has been detected in U.S. foods, exposure to the general population may occur through consumption of foods containing triadimefon residues.
Environmental Fate TERRESTRIAL FATE: In soil, the carbonyl group is reduced to a hydroxyl group, with the formation of triadimenol. TERRESTRIAL FATE: Although soil fungi have been shown to metabolize triadimefon to triadimenol(1-2), the relative importance of biodegradation as a fate process in soil is uncertain. An experimentally determined Koc value of 520 and field studies indicate that triadimefon has low mobility in soil . The US Dept of Agric's Pesticide Properties Database lists a soil half-life of 26 days for triadimefon . Laboratory persistence studies using a silty clay loam soil with no prior exposure to triadimefon found a soil half-life of 15 days . West German field tests in various soils and conditions found half-lives ranging from 10 days to 7 months . AQUATIC FATE: The exact fate of triadimefon in the aquatic environment is not clear. Although fungi have been shown to metabolize triadimefon to triadimenol(1-2), the relative importance of biodegradation as a fate process in water is uncertain. In the absence of catalytic action, hydrolysis is not important ; hydrolysis can occur via a catalytic action by water salts, mainly divalent cations ; degradation in tap water at 70 deg C has been reported to reach 90% in 8 weeks . Based upon an experimentally determined Koc value of 520(4,SRC), some partitioning from the water column to sediment and suspended material may occur. Aquatic volatilization and bioconcentration are not expected to be important fate processes. ATMOSPHERIC FATE: Based upon a reported vapor pressure of 1.5X10-8 mm Hg at 25 deg C , triadimefon can exist in both the vapor and particulate phases in the ambient atmosphere(2,SRC). It will degrade rapidly in the vapor phase by reaction with photochemically produced hydroxyl radicals with an estimated half-life of about 14 hr(3,SRC). Particulate phase triadimefon released to air during applications of triadimefon fungicides will be removed from air physically by dry and wet deposition.
Drinking Water Impact GROUNDWATER: During various sampling periods in 1984, water samples were collected from 206 waterworks wells in German and analyzed from 35 different pesticides ; triadimefon was not detected above a detection limit of 0.05 ug/l .

DISCLAIMER - Please Read

Florida-Spectrum List of Services
Florida-Spectrum Homepage