Butamifos 抑草磷

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抑草磷

CAS: 36335-67-8
英文名称:Butamifos
化学名称:O-乙基-O-(5-甲基-2-硝基苯基)-N-仲丁基氨基硫代磷酸酯;Phosphoramidothioicacid,N-(1-methylpropyl)-,O-ethyl-O-(5-methyl-2- nitrophenyl
其他名称:克蔓磷,丁胺磷., S 2846
分子式:C13H21N2O4PS
分子量:322.36

理化性质:棕色液体。密度1.88(25℃),粘度703.3cp/20℃,229.4cp/30℃,蒸气压0.084Pa/27℃。溶于有机溶剂,如二甲苯、甲醇、丙醇等可溶解50%以上。难溶于水, 20℃时可溶5.1mg/L。对热稳定,对酸和中性溶液稳定。

毒性: 小鼠急性口服LD50为400~430mg/kg,经皮LD50为2.5g/kg以上;大鼠急性经口LD50为630~790mg/kg,经皮LD50为4.0g/kg以上。以300mg/kg喂鼠80周对体重增加无影响,也不影响鼠的繁殖和胎鼠发育。急性中毒症状同一般有机磷相似。但母鸡喂750mg/kg(两次),或每天以50mg/kg剂量喂4周,均未引起迟发性神经毒性作用。在体内易代谢,代谢物很快从尿、粪中排出。虹鳟LC5047ppm,蓝腮翻车鱼LC50>400ppm(96h).

作用特点及用途:有机磷除草剂, 适用作物: 水稻、小麦、大豆、棉花、豌豆、菜豆、马铃薯、玉米、胡萝卜和移栽莴苣、甘蓝、洋葱等。

防治对象: 看麦娘、稗、马唐、蟋蟀草、早熟禾、狗尾草、雀舌草、藜、酸模、猪殃殃、一年蓬、苋、繁缕、马齿苋、小苋菜、车前、莎草、菟丝子等一年生禾本科杂草和某些阔叶杂草。

该药在土壤中的移动性很小,主要破坏植物的分生组织。因此作物和杂草的分生组织位置和结构,土壤结构,施药方法对该药的选择性有很大影响。一般旱田作物如胡萝卜、棉花、麦类、豆类、薯类、旱稻等可用1~2.4kg ai/hm2作播后苗前土壤处理。而莴苣、甘蓝、洋葱等芽前处理有药害。可在移栽前后处理,水稻田可用1~1.5kg/hm2于生长初期和中期处理,而芽期处理则有药害。杂草4叶前可用0.5~1kg/hm2处理,但该法对胡萝卜、蕃茄和棉花等有药害。

剂型: 50%乳剂。
生产方法:
生产情况:广州佰默生物科技有限公司

 

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butamifos
Herbicide
HRAC K1 WSSA 3; phosphoroamidate

  Butamifos

NOMENCLATURE
Common name butamifos (BSI, E-ISO, F-ISO, JMAF)
IUPAC name O-ethyl O-6-nitro-m-tolyl sec-butylphosphoramidothioate
Chemical Abstracts name O-ethyl O-(5-methyl-2-nitrophenyl) (1-methylpropyl)phosphoramidothioate
Other names butamiphos CAS RN [36335-67-8] Development codes S-2846 (Sumitomo)

PHYSICAL CHEMISTRY
Mol. wt. 332.4 M.f. C13H21N2O4PS Form Tech. is a yellow-brown liquid. V.p. 84 mPa (27 ºC) KOW logP = 4.62 (25 ºC) S.g./density 1.188 (25 ºC) Solubility In water 6.19 mg/l (25 ºC). Readily soluble in acetone, methanol, and xylene at room temperature.

COMMERCIALISATION
History Herbicide reported by M. Ueda (Jpn. Pestic. Inf., 1975, No. 23, p. 23). Introduced by Sumitomo Chemical Co., Ltd. Patents GB 1359727; US 3936433 Manufacturers Sumitomo

APPLICATIONS
Biochemistry Microtubule assembly inhibition. Mode of action Selective non-systemic herbicide. Uses A contact herbicide used pre-emergence. Effective against annual and especially graminaceous weeds, in beans, lawns, rice and vegetables. Formulation types EC; WP. Selected products: 'Cremart' (Sumitomo)

OTHER PRODUCTS
'Hie Top' (Nihon Nohyaku) mixtures: 'Agrostar' (+ cyhalofop-butyl+ pyrazosulfuron-ethyl) (Sumitomo)

ANALYSIS
Product analysis by glc or by colorimetry (M. Horiba et al., Nippon Nogei Kagaku Kaishi, 1979, 53,111). Details of residue analysis available from Sumitomo Chemical Co.

MAMMALIAN TOXICOLOGY
Oral Acute oral LD50 for male rats 1070, female rats 845 mg/kg. Skin and eye Acute percutaneous LD50 for rats >5000 mg/kg. Non-irritant to skin and eyes (rabbits). Inhalation LC50 for rats >1200 mg/m3 air. Toxicity class WHO (a.i.) II

ECOTOXICOLOGY
Fish LC50 (48 h) for carp 2.4 mg/l.