Product Name:Tebuconazole 25%EC

Item No.: 107534-96-3

Description:

Tebuconazole

Fungicide

FRAC  3; DMI: triazole

NOMENCLATURE

Common name tebuconazole (BSI, draft E-ISO)

IUPAC name (RS)-1-p-chlorophenyl-4,4-dimethyl-3-(1H-1,2,4-triazol-1-ylmethyl)pentan-3-ol 

Chemical Abstracts name (?-a-[2-(4-chlorophenyl)ethyl]-a-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol 

Other names fenetrazole*; terbuconazole*; terbutrazole*; ethyltrianol*  CAS RN [107534-96-3]  EEC no. ELINCS: 403-640-2  Development codes HWG 1608 (Bayer) 

PHYSICAL CHEMISTRY

Mol. wt. 307.8 

M.f. C16H22ClN3O 

Form Colourless crystals; (tech., colourless to light brown powder). 

M.p. 105 ºC 

V.p. 1.7 ´ 10-3 mPa (20 ºC) (OECD 104) 

KOW logP = 3.7 (20 °C) 

Henry 1 ´ 10-5 Pa m3 mol-1 (20 °C) 

S.g./density 1.25 (26 °C) 

Solubility In water 36 mg/l (pH 5-9, 20 ºC). In dichloromethane >200, isopropanol, toluene 50-100, hexane <0.1 (all in g/l, 20 ºC). 

Stability Stable to elevated temperatures, and to photolysis and hydrolysis in pure water, under sterile conditions; hydrolysis DT50 >1 y (pH 4-9, 22 °C). See also Environmental Fate. 

APPLICATIONS

Mode of action Systemic fungicide with protective, curative, and eradicant action. Rapidly absorbed into the vegetative parts of the plant, with translocation principally acropetally. 

Uses As a seed dressing, tebuconazole is effective against various smut and bunt diseases of cereals  As a spray, tebuconazole controls numerous pathogens in various crops

Phytotoxicity Good plant compatibility in most crops with any formulation, and achieved in more sensitive crops by appropriate formulations, e.g. WP, WG or SC. 

ANALYSIS

Residues in soil, water and plant material determined by glc (W. Maasfeld, Pflanzenschutz-Nachr. Bayer (Engl. Edn.), 1987, 40, 29; H. Allmendinger, ibid., 1991, 44, 5). Details available from Bayer.