氟磺唑草胺

英文通用名稱：Flumetsulam
中文通用名稱：氟唑嘧磺草胺
英文商品名稱：Broadstrike[陶氏益農]; DE-498; XRD-498; Aurora；preside,Scorpion
中文商品名稱：唑嘧磺草胺;闊草清[陶氏益農]
英文化學名稱：N-(2,6-difluorophenyl)-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine-2-sulfonamide
中文化學名稱：2-(2,6-二氟苯基磺醯胺基)-5-甲基-[1,2,4]-三唑[1,5a]嘧啶
性狀描述：灰白色無味固體，熔點251~253℃，蒸氣壓0.37nPa(25℃)，密度1.77(21℃)，溶 解度水中49mg/L(pH2.5溶解度隨pH值升高)，在丙酮、甲醇中輕微溶解，不溶 於二甲苯、己烷，水中光解6－12月，土中光解3個月。Composition:Form:Off-white odourless solid. M.p.: 251-253 ℃ B.p.:V.p.: 3.7 ×10 mPa (25 ℃) Henry: S.g./density: 1.77 (21 ℃) Solubility: In water 49 mg/l (pH 2.5; solubility increases with pH). Very slightly soluble in acetone and methanol. Insoluble in hexane and xylene.Stability: Aqueous photolysis DT50 6-12 mo. Soil photolysis DT50 3 mo. F.p.: >93 ℃
毒理學性質：急性經口：>5000mg/kg；急性經皮：>2000mg/kg(兔)。Oral: Acute oral LD50 for rats >5000 mg/kg.Skin and eye Acute percutaneous LD50: for rabbits >2000. Non-sensitising to skin (guinea pigs). Slightly irritating to eyes (rabbits). Inhalation: (4 h) >1.2 mg/l.Birds: Acute oral LD50 for bobwhite quail >2250 mg/l. Eight-day dietary LC50 for bobwhite quail and mallard duck >5620 mg/l.Fish: LC50 (96 h) for silverside minnow >379 mg/l. Non-toxic to fathead minnow and bluegill sunfish.Bees: LC50 >100 μg/bee. NOEL 36 μg/bee.Daphnia: Non-toxic.Algae: Worms: Other aquatic spp.: LC50 for shrimp >349.
作用特點： 是ALS抑制劑，對菸草離體ALS酶I50值為0.02mg/kg。
用途：無論莖葉或土壤處理， 對大多數闊葉雜草、禾本科及莎草科雜草均有高度活性，土壤處理的殺草譜 更廣。