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　　苯嗪草(cao)酮編輯中文(wen)其他(ta)名稱：苯嗪草(cao)、苯甲嗪

　　農藥類(lei)別：除草劑

　　化學名稱：3-甲基-4-氨基-6-苯基-4，5-二氫-1,2,4-三(san)嗪-5-酮(tong)

　　苯(ben)(ben)嗪(qin)草酮(tong)(tong)屬三(san)秦(qin)酮(tong)(tong)類化合物。原(yuan)藥(yao)(質量分數≥98.0%)外觀為淡(dan)黃色(se)至(zhi)白色(se)晶(jing)狀固體;熔(rong)點166℃;蒸汽壓(20℃)：86nPa;溶(rong)解度(25℃)：水中(zhong)1.7g/L，環已酮(tong)(tong)中(zhong)10-50g/K g,二氯(lv)甲烷中(zhong)20-50g/L，己烷中(zhong)<100mg/L，異丙醇中(zhong)5-10g/L，甲苯(ben)(ben)中(zhong)2-5g/L。穩定(ding)(ding)性：在(zai)酸性介(jie)質中(zhong)穩定(ding)(ding)，pH>10時不穩定(ding)(ding)。化學名稱(cheng)：4-氨基-3-甲基-6-苯(ben)(ben)基-1，2，4-三(san)嗪(qin)-5(4H)-酮(tong)(tong)。苯(ben)(ben)嗪(qin)草酮(tong)(tong)70%水分散(san)粒劑(ji)外觀為能自由流動的顆粒，無可見外來雜質和硬(ying)團(tuan)塊;pH6.5-8.5;濕潤時≦60s;懸(xuan)浮(fu)率≧80%;粒度(1410μm-250μm)≧95%;常溫下(xia)貯存產(chan)品質量保證期(qi)為2年(nian)。

　　毒(du)性(xing)(xing)：苯嗪(qin)(qin)草(cao)(cao)(cao)酮(tong)(tong)原藥大鼠(shu)(shu)雄(xiong)急(ji)性(xing)(xing)經(jing)(jing)口(kou)(kou)LD50 3830mg/kg，大鼠(shu)(shu)雌(ci)性(xing)(xing)急(ji)性(xing)(xing)經(jing)(jing)口(kou)(kou)>LD50 2610mg/kg，急(ji)性(xing)(xing)經(jing)(jing)皮(pi)LD50>2000mg/kg，急(ji)性(xing)(xing)吸(xi)入LC50>2151.2mg/m3;對(dui)大耳白(bai)兔皮(pi)膚(fu)無刺激(ji)(ji)性(xing)(xing)，眼(yan)睛輕度(du)至中度(du)刺激(ji)(ji)性(xing)(xing);豚(tun)鼠(shu)(shu)皮(pi)態反應(致(zhi)敏)試(shi)驗(yan)(yan)結(jie)(jie)果(guo)為(wei)(wei)(wei)弱致(zhi)敏物(致(zhi)敏率(lv)為(wei)(wei)(wei)0);大鼠(shu)(shu)90d亞慢性(xing)(xing)喂養試(shi)驗(yan)(yan)******無作用(yong)劑(ji)量：雄(xiong)性(xing)(xing)11.06mg/kg·d，雌(ci)性(xing)(xing)為(wei)(wei)(wei)16.98mg/kg·d;3項致(zhi)突變試(shi)驗(yan)(yan)：Ames試(shi)驗(yan)(yan)、小(xiao)鼠(shu)(shu)骨髓細胞微(wei)核試(shi)驗(yan)(yan)、小(xiao)鼠(shu)(shu)骨髓細胞染色體(ti)畸變試(shi)驗(yan)(yan)結(jie)(jie)果(guo)均(jun)為(wei)(wei)(wei)陰性(xing)(xing)，未見致(zhi)突變作用(yong)。苯嗪(qin)(qin)草(cao)(cao)(cao)酮(tong)(tong)70%水分散粒劑(ji)大鼠(shu)(shu)雄(xiong)急(ji)性(xing)(xing)經(jing)(jing)口(kou)(kou)LD50 2150mg/kg，大鼠(shu)(shu)雌(ci)性(xing)(xing)急(ji)性(xing)(xing)經(jing)(jing)口(kou)(kou)>LD50 1470mg/kg;對(dui)大耳白(bai)兔皮(pi)膚(fu)輕度(du)刺激(ji)(ji)性(xing)(xing)，眼(yan)睛中度(du)刺激(ji)(ji);豚(tun)鼠(shu)(shu)皮(pi)膚(fu)變態反應(致(zhi)敏)試(shi)驗(yan)(yan)結(jie)(jie)果(guo)為(wei)(wei)(wei)弱致(zhi)敏物(致(zhi)敏率(lv)為(wei)(wei)(wei)0)。苯嗪(qin)(qin)草(cao)(cao)(cao)酮(tong)(tong)原藥和苯嗪(qin)(qin)草(cao)(cao)(cao)酮(tong)(tong)70%水分散粒劑(ji)均(jun)為(wei)(wei)(wei)低毒(du)除草(cao)(cao)(cao)劑(ji)。

　　環境安全生物評(ping)價：苯嗪草酮70%水(shui)分(fen)散粒劑對(dui)斑馬魚(yu)LC50(96h)>100mg/L;鵪鶉(急(ji)性經口)1.04*103mg/Kg;蜜蜂(feng)(接(jie)觸)LC50(48h)>100μg a.i/蜜蜂(feng);家蠶(can)LC50<200mg/kg桑葉。該藥(yao)對(dui)魚(yu)、鳥、蜜蜂(feng)、家蠶(can)均(jun)為(wei)低毒。使用時避免(mian)藥(yao)液直(zhi)接(jie)進入水(shui)體。

　　應(ying)用(yong)：苯(ben)嗪(qin)草(cao)酮屬三嗪(qin)酮類選(xuan)擇性芽前(qian)除草(cao)劑，主要通過(guo)(guo)植(zhi)物根部吸收，在輸送到葉子內(nei)。通過(guo)(guo)抑(yi)制光合(he)作(zuo)用(yong)的希(xi)爾反應(ying)而起(qi)到殺(sha)草(cao)作(zuo)用(yong)。