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NOMENCLATURE Myclobutanil
Common name myclobutanil (BSI, ANSI, draft E-ISO, (m) draft F-ISO)
IUPAC name 2-p-chlorophenyl-2-(1H-1,2,4-triazol-1-ylmethyl)hexanenitrile;
2-(4-chlorophenyl)-2-(1H-1,2,4-triazol-1-ylmethyl)hexanenitrile
Chemical Abstracts name a-butyl-a-(4-chlorophenyl)-1H-1,2,4-triazole-1-propanenitrile
CAS RN [88671-89-0] Development codes RH-3866 (Rohm & Haas)
PHYSICAL CHEMISTRY Myclobutanil
Mol. wt. 288.8 M.f. C15H17ClN4 Form Pale yellow solid. M.p. 63-68 ºC (tech.) B.p.
202-208 ºC/1 mmHg V.p. 0.213 mPa (25 ºC) KOW logP = 2.94 (pH 7-8, 25 ºC) Henry 4.33
 10-4 Pa m3 mol-1 (calc.) Solubility In water 142 mg/l (25 ºC). Soluble in common
organic solvents, e.g. ketones, esters, alcohols and aromatic hydrocarbons, all 50-100
g/l. Insoluble in aliphatic hydrocarbons. Stability Stable under normal storage
conditions. Aqueous solutions decompose on exposure to light, DT50 222 d (sterile
water), 0.8 d (sensitised sterile water), 25 d (pond water); no hydrolysis (28 ºC) in
28 d (pH 5, 7, and 9).
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