Cumyluron 苄草隆

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中文通用名称: 苄草隆
英文通用名称: cumyluron
商品名称: ガミ-ラ(Gamyla)、 ハヒコラン
试验代号: JC-940
化学名称: 1-(2-l氯苯基)-3-(1-甲基-1-苯基乙基)脲
1-(2-chlorophenyl)-3-(1-methyl-1-phenylethyl)urea
CA主题索引名及CAS登录号:
N-(2-chlorophenyl)-N’ -(1-methyl-1-phenylethyl)urea
[99485-76-4]

化学结构类型: 脲类
理化性质: 纯品为无色针状结晶体;熔点166~167℃;密度1.213(20℃); 蒸气压为1.33×10-9Pa(22.3℃)。 溶解度(20℃):水1.0mg/l,甲醇21.5、乙醇19.4、丙酮14.5、乙腈7.6、苯0.8、正己烷0.4g/l。

毒性: 大鼠急性经口L D50:雄2074、雌 961mg/kg;小鼠急性经口L D50:雄、雌 >5000mg/kg。无致突变性、无致畸性。

制剂: 8%颗粒剂。
作用机理: 细胞分离与细胞生成抑制剂。
适宜作物: 水稻(移栽和直播)
安全性: 对水稻安全。
防除对象: 主要用于防除重要的一年生和多年生禾本科杂草。
使用方法: JC-940主要用于水稻田苗前除草,使用剂量为1.2~2.4kg ai/ha。

合成方法: 取代的苄胺与苄基异氰酸酯反应即得目的物。反应式如下:

主要原料与中间体: 取代的苄胺
分析方法: HPLC
开发公司: 日本Carlit公司研制,日本Carlit公司、丸红、八洲化学公司开发。

 

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cumyluron
Herbicide
HRAC Z

  Cumyluron

NOMENCLATURE
Common name cumyluron (BSI, pa E-ISO)
IUPAC name 1-(2-chlorobenzyl)-3-(1-methyl-1-phenylethyl)urea
Chemical Abstracts name N-[(2-chlorophenyl)methyl]-N'-(1-methyl-1-phenylethyl)urea
CAS RN [99485-76-4] Development codes JC-940 (Japan Carlit)

PHYSICAL CHEMISTRY
Composition >99.5% Mol. wt. 302.8 M.f. C17H19ClN2O Form White, odourless, crystalline solid. M.p. 166-167 °C B.p. 282?.5 °C/100.94 kPa V.p. 8.0 ´ 10-12 mPa (25 °C) KOW logP = 2.61 S.g./density 1.22 (20 °C) Solubility In water 0.879 mg/l (pH 6.7, 20.0?.5 °C). In acetone 11.0, methanol 14.4, hexane 0.00357, benzene 1.4, xylene 0.352 (g/l, 20.0?.5 °C). Stability Stable up to 150 °C. In water, DT50 1500 d (pH 5.0), 2830 d (pH 9.0).

COMMERCIALISATION
History Discovered by The Japan Carlit Co., Ltd; rights sold to Marubeni Corp. in 1996.

APPLICATIONS
Biochemistry Inhibitor of cell division or cell growth. Mode of action Absorbed by plant roots. Uses Pre-emergence herbicide for control of sedges (Cyperus spp.) in rice, at 700-1500 g/ha, and of annual bluegrass (Poa annua) in turf, at 1-2 ml/m2 (45% formulation). Formulation types GR; SC. Selected products: 'Gamyla' (rice) (Marubeni, Yashima); 'Mac 1' (turf) (Marubeni); mixtures: 'Kusabue' (+ pentoxazone) (Marubeni, Yashima, Nissan, Kaken); 'Habikoran' (+ thenylchlor+ benzofenap) (Yashima)

MAMMALIAN TOXICOLOGY
Oral Acute oral LD50 for male rats 2074, female rats 961 mg/kg. Skin and eye Acute dermal LD50 for rats and mice >2000 mg/kg. Inhalation LC50 for rats >6.21 mg/l. Other Non-carcinogenic, non-teratogenic.

ECOTOXICOLOGY
Birds Acute oral LC50 for quail >5620 ppm diet. Fish Acute LC50 (96 h) for carp >50, rainbow trout >10 ppm. Daphnia LC50 (24 h) for D. pulex >50 ppm. Algae EbC50 (72 h) for Selenastrum capricornutum >55mg/l. Bees LC50 (oral, in water) >200 ppm. Other beneficial spp. LC50 for silkworm >10 g/l.