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基本信息 理化性质:乙嘧酚属杂环类杀菌剂。纯品外观为白色粉状固体;熔点:159~160℃;蒸汽压(25℃)0.267mPa;溶解度(室温):水中为0.02g/100ml,几乎不溶于丙酮、微溶于双环丙酮醇和乙醇种,在氯仿、三氯乙烷、强酸和强碱中溶解。原药质量分数≥95%,外观为白色粉状固体;对热以及在酸性和碱性溶液中均稳定。 毒性:乙嘧酚原药大鼠急性经口LD50>5000mg/kg,大鼠急性经皮LD50>2000mg/kg,对兔皮肤和眼睛无刺激性,豚鼠皮肤变态反应(致敏)试验结果,属弱致敏物;原药大鼠3个月亚慢性喂养试验最大无作用剂量:雄性为50mg/kg·d,雌性为1050mg/kg·d;Ames试验,小鼠骨髓细胞微核试验、小鼠睾丸细胞染色体畸变试验三项致突变试验均为阴性,未见致突变作用。乙嘧酚原药属低毒。 功能优势 使用方法 注意事项 |
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CAS RN [23947-60-6]. Fungicide reported by R. M. Bebbington et al. (Chem. Ind. (London), 1969, p. 1512). Introduced by ICI Plant Protection Division (later Syngenta AG) and first marketed in 1970. Common names ethirimol (BSI, E-ISO); éthyrimol ((m ) F-ISO) IUPAC name 5-butyl-2-ethylamino-6-methylpyrimidin-4-ol CA name 5-butyl-2-(ethylamino)-6-methyl-4(1H )-pyrimidinone. Development codes PP149 (ICI) M.f. C11H19N3O Composition Tech. material is 97% pure. Mol. wt. 209.3 Form Colourless crystals. M.p. 159-160 ºC (phase change at c. 140 ºC) V.p. 0.267 mPa (25 ºC) KOW logP = 2.3 (pH 7, 20 ºC) Henry £2 ´ 10-4 (pH 5.2), £4 ´ 10-4 (pH 7.3), £4 ´ 10-4 (pH 9.3) Pa m3 mol-1 (20 °C) S.g./density 1.21 (25 ºC) Solubility In water 253 (pH 5.2), 150 (pH 7.3), 153 (pH 9.3) (all in mg/l, 20 ºC). In chloroform 150, ethanol 24, acetone 5 (all in g/kg, 20 ºC). Stability Stable to heat, and in acidic and alkaline solutions in the dark. Aqueous solution exposed to sunlight and air had DT50 c. 21 d. pKa 5, weak base (K. Chamberlain et al., Pestic. Sci ., 47, 265 (1996) and ref. therein). |