Beta-cypermethrin 高效氯氰菊酯

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高效氯氰菊酯

高效氯氰菊酯高效氯氰菊酯是农业杀虫剂,主要防治农作物上发生的鳞翅目害虫,具有强毒性。

高效氯氰菊酯
通用名称 Beta cypermethrin
中文名称 高效氯氰菊酯
商品名称 高保、高效氯氰菊酯
化学名称 2,2-二甲基-3-(2,2-二氯乙烯基)环丙烷羧酸-α-氰基-(3-苯氧基)-苄酯

理化性质
该品为两对外消旋体混合物,其顺反比约为 2:3。原药外观为白色至奶油色结晶体, 易溶于芳烃、酮类和醇类。常用制剂有45%乳油。
熔点 64~71℃(峰值67℃)。
蒸气压 180mPa(20℃)
比重 1.32g/ml(理论值),0.66g/ml(结晶体,20℃)
溶解度 在pH=7的水中,51.5(5℃)、93.4 (25℃)、276.0 (35℃)μg/l(理论值),异丙醇11.5,二甲苯749.8,二氯甲烷3878,丙酮2102,乙酸乙酯1427,石油醚13.1(均为mg/ml,20℃)
稳定性 150℃,空气及阳光下及在中性及微酸性介质中稳定。碱存在下差向异 构,强碱中水解。
毒 性:工业品:大鼠急性经口LD50 649mg/kg,急性经皮LD50>5000mg /kg,对兔有轻微皮肤和眼刺激。对豚鼠不致敏。大鼠的急性吸入LC50 >1.97mg/l(小时)。4.5%乳油:大鼠急性经口LD50853mg/kg,急性经皮 LD501830mk/kg。5%可湿粉:小鼠急性经口LD50 2549mg/kg,急性经皮 LD50>3000mg /kg。该品对蜜蜂、鱼、蚕、鸟均为高毒,使用时应注意避免污染水源地、避免在蜜源作物开花期、避免污染桑园处使用。

中毒急救:无特效解毒剂,请对症治疗。

制 剂:95%原药、4.5%乳油、5%可湿粉、及与其它杀虫剂的复配制剂如40%甲.辛.高氯乳油、29%敌畏.高氯乳油、30%高氯.辛乳油。

应 用:该品为非内吸性但具备触杀和胃毒作用的杀虫剂。通过与害虫钠通道相互作用而 破坏起神经系统的功能。用于公共卫生和畜牧业中防治多种害虫如蝇,蟑螂 蚊,蚤,虱,臭虫,动物体外寄生虫如蜱,螨等。

标准编号 名称 技术要求

HG3629-1999 高效氯氰菊酯
原药 项 目 指 标
优等品 一级品 合格品
高效氯氰菊酯含量,% ≥ 99.0 95.0 92.0
干燥减量,% ≤ 0.1 0.3 0.5
ph值 4.0~6.0 4.0~6.0 4.0~6.0
HG3630-1999 高效氯氰菊酯
原药浓剂 高效氯氰菊酯含量,% ≥ 27.0
水分含量,% ≤ 0.3
ph值 4.0-6.0
HG3631-1999 45%高效氯氰菊酯
乳油 高效氯氰菊酯含量,% ≥ 4.5
水分含量,% ≤ 0.5
ph值 4.0~6.0
乳液稳定性(稀释200倍) 合格
低温稳定性 合格
热贮稳定性 合格
注:低温稳定性和热贮稳定性试验,每6个月至少进行一次.

分析方法
gb/hg ①150×3.9mm 5µm硅胶柱 λ:230nm
流动相:正已烷+无水乙醚=98+2 流速:1ml/min
②仲载法:150×3.9mm硅胶柱
流动相:正已烷+乙酸乙酯=99+1 流速:1.0ml/min
内标物:苯甲酸甲酯 λ:230nm
cipac
fao/who
其他 150×3.9mm不锈钢柱 silica 4µm
流动相:石油醚+正已烷+乙醚=90+10+1
流速:1.4ml/min λ:254nm

产品特点:
与防治对象 高效氯氰菊酯是一种拟除虫菊酯类杀虫剂,生物活性较高,是氯氰菊酯的高效异构体,具有触杀和胃毒作用。杀虫谱广、击倒速度快,杀虫活性较氯氰菊酯高。适用于防治棉花、蔬菜、果树、茶树、森林等多种植物上的害虫及卫生害虫。
1、棉蚜、蓟马:蚜株率达30%或卷叶株率在5%时进行防治。每亩用4.5%乳油30-50ml,加水40-50kg,均匀喷雾。
2、棉蛉虫、红蛉虫:在棉花二三代卵孵化盛期施药。每亩用4.5%乳油30-50ml,加水40-50kg,均匀喷雾。
3、菜青虫、小菜娥:幼虫2-3龄期进行防治,每亩用4.5%乳油20-40毫升,加水40-50kg,均匀喷雾。
4、菜蚜:在无翅蚜发生盛期防治,每亩用4.5%乳油20-30毫升,加水40-50kg,均匀喷雾。
5、柑橘潜叶娥:在放梢初期及卵孵化盛期进行防治。每亩用4.5%乳油加水稀释 2250-3000 倍,均匀喷雾。
6、柑橘红蜡蚧:在卵孵化盛期防治。用4.5%乳油加水稀释900倍均匀喷雾。
7、茶尺蠖:于2-3龄幼虫盛发期施药,每亩用4.5%乳油25--40毫升,加水60-75kg,均匀喷雾。
8、烟青虫:于 2-3龄幼虫期施药,每亩用4.5%乳油25-40毫升,加水 60-75kg,均匀喷雾。
9、各种松毛虫、杨树舟娥、美国白娥:在2-3龄幼虫发生期,用4.5%乳油4000-8000倍液喷雾, 飞机喷雾每公倾用量60-150毫升。
10、卫生害虫:防治成蚊及家蝇成虫,每平方米用4.5%可湿性粉剂0.2-0.4克,加水稀释250倍,进行滞留喷洒。防治蟑螂,在蟑螂栖息地和活动场所每平方米用4.5%可湿性粉剂0.9克,加水稀释250-300倍,进行滞留喷洒。防治蚂蚁,每平方米用4.5%可湿性粉剂1.1-2.2克,加水稀释250-300倍,进行滞留喷洒。

 

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beta-cypermethrin
Insecticide
IRAC 3; pyrethroid

  Beta-cypermethrin

NOMENCLATURE
Common name beta-cypermethrin (BSI, draft E-ISO)
IUPAC name Roth: A reaction mixture comprising two enantiomeric pairs in ratio c. 2:3 (S)-a-cyano-3-phenoxybenzyl (1R)-cis-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate and
(R)-a-cyano-3-phenoxybenzyl (1S)-cis-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate
with (S)-a-cyano-3-phenoxybenzyl (1R)-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate and
(R)-a-cyano-3-phenoxybenzyl (1S)-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate
Chemical Abstracts name cyano(3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate; 2 parts of enantiomer pair [(1R)-1a(S*),3a] and [(1S)-1a(R*),3a] with 3 parts of enantiomer pair [(1R)-1a(S*),3b] and [(1S)-1a(R*),3b]
Other names asymethrin*(rejected common name proposal) CAS RN [52315-07-8] (undefined stereochemistry, also used for cypermethrin); [72204-43-4] ([(1S)-1a(R*),3a] isomer; Roth: (S) (1R)-cis- isomer); [65731-84-2] ([(1R)-1a(S*),3a] isomer; Roth: (R) (1S)-cis- isomer); [83860-31-5] ([(1S)-1a(R*),3b] isomer; Roth: (S) (1R)-trans- isomer); [65732-07-2] ([(1R)-1a(S*),3b] isomer; Roth: (R) (1S)-trans- isomer) EEC no. 276-457-7 (S) (1R)-cis- isomer; 265-898-0 (R) (1S)-cis- isomer; 281-086-9 (S) (1R)-trans- isomer; 265-896-6 (R) (1S)-trans- isomer Development codes CHINOIN 0619200; AT0IABO3 Official codes OMS 3068

PHYSICAL CHEMISTRY
Composition A mixture consisting of two enantiomeric pairs in ratio 2:3: (S) (1R)-cis and (R) (1S)-cis with (S) (1R)-trans and (R) (1S)-trans. Tech. grade beta-cypermethrin contains ³95% (normally >97%) relevant stereoisomers. Mol. wt. 416.3 M.f. C22H19Cl2NO3 Form Tech. forms colourless or pale yellow crystals. M.p. 63.1-69.2 ºC (varies with even a small - 1% - change in isomer ratio) B.p. 286.1?.06 ºC/97.4 kPa V.p. 1.8 ´ 10-4 mPa (20 ºC) KOW logP = 4.7 ?.04 S.g./density 1.336?.0050 (20 ºC) Solubility In water 51.5 (5 ºC), 93.4 (25 ºC), 276.0 (35 ºC) (all in mg/l, pH 7). In isopropanol 11.5, xylene 349.8, dichloromethane 3878, acetone 2102, ethyl acetate 1427, petroleum ether 13.1 (all in mg/ml, 20 ºC). Stability Stable to 150 ºC; to air and sunlight; in neutral and slightly acidic media; epimerised in presence of base, hydrolysed in strongly alkaline media. DT50 (extrapolated) 50 d (pH 3, 5, 6), 40 d (pH 7), 20 d (pH 8), 15 d (pH 9) (all at 25 ºC).

COMMERCIALISATION
History Insecticide introduced in Hungary (1989) by Chinoin Pharmaceutical & Chemical Works Co., Ltd (now Agro-Chemie Pesticide Manufacturing Trading and Distributing Ltd). Patents HU 198612; EP 208758; US 4963584 Manufacturers Agro-Chemie; Fengle; Jiangsu Yangnong

APPLICATIONS
Biochemistry Acts on the nervous system of insects, disturbs the function of neurons by interaction with the sodium channel. Mode of action Non-systemic insecticide with contact and stomach action. Uses It can be used against a wide range of insect pests in public health (e.g. flies, cockroaches, mosquitoes, fleas, lice, bugs) and in veterinary applications (ectoparasitic ticks and mites). In plant protection, it is effective against Coleoptera and Lepidoptera and gives good protection against Orthoptera, Diptera, Hemiptera, and Homoptera. Mainly used in alfalfa, cereals, cotton, grapes, maize, oilseed rape, pome fruit, potatoes, soya beans, sugar beet, tobacco and vegetables. Formulation types CS; EC; ME; SC; UL; gel. Selected products: 'Chinmix' (Agro-Chemie); 'Peststop-B' (Bábolna); mixtures: 'Chintop' (+ quinalphos) (Agro-Chemie)

OTHER PRODUCTS
'Chinmix Turbo' (with synergist) (Agro-Chemie)

ANALYSIS
Product analysis by hplc or glc; analysis of pyrethroids reviewed by E. Papadopoulou-Mourkidou in Comp. Analyt. Profiles. Residues determined by glc. Details available from Agro-Chemie.

MAMMALIAN TOXICOLOGY
Oral Acute oral LD50 for female rats 166, male rats 178, female mice 48, male mice 43 mg/kg. Skin and eye Acute percutaneous LD50 for rats >5000 mg/kg; mild skin and eye irritant (rabbits); non-sensitising to skin (guinea pigs). Inhalation LC50 (4 h) for rats >1.97 mg/l. NOEL (2 y) for rats 250 mg/kg diet; (90 d) for rats 100 mg/kg diet. Not teratogenic in rats or rabbits. In 3-generation reproduction study, NOEL for rats 350 mg/kg. In 2 y carcinogenicity study, NOEL 500 mg/kg diet. ADI 0.05 mg/kg. Other Not mutagenic in Ames, SCE and micronucleus assays. Toxicity class WHO (a.i.) II (company classification)

ECOTOXICOLOGY
Birds Acute oral LD50 for quail 8030, pheasants 3515 mg 5% a.i. formulation/kg. LC50 (8 d) for pheasants and quail >5000 mg 5% a.i. formulation/kg diet. Fish LC50 (96 h) for carp 0.028, catfish 0.015, grass carp 0.035 mg 5% a.i. formulation/l. Fish are not harmed under normal field conditions. Daphnia LC50 (96 h) 0.00026 mg 5% a.i. formulation/l. Algae LC50 for Selenastrum capricornutum 56.2 mg/l. Bees LD50 (oral, 48 h) 0.0018 mg a.i./bee (as 5% formulation); (contact, 24 h) 0.085 l/ha (as 5% formulation); but not harmful at normal rate under field conditions.

ENVIRONMENTAL FATE
Soil/Environment Soil DT50 10 d (lime-furred chernozom, pH 6.96). DT50 in water 1.2 d.