毒理性
识别和使用:氯磺隆是一种白色结晶固体。它是一种选择性芽前或早期芽后除草剂,使用时剂量较低。人体研究:无数据可用。动物研究:在两年的喂养试验中,大鼠每天摄入100毫克/千克的剂量,小鼠每天摄入500毫克/千克的剂量,未表现出不良影响。在大鼠的发育研究中,1500毫克/千克/天的剂量下母体体重和食物消耗减少,胎儿体重在1500毫克/千克/天的剂量下也降低。没有发现致畸作用。氯磺隆在沙门氏菌TA98、TA100、TA1535、TA1537菌株中进行的48小时测试中,不论是否加入代谢活化,0、0.001、0.005、0.01、0.05、0.1或0.5微克/平板的剂量下均未表现出诱变性。生态毒性研究:氯磺隆在急性暴露基础上对鸟类和哺乳动物实际无毒,并且在亚急性饮食暴露基础上对鸟类也实际无毒。在慢性暴露后,鹌鹑显示出雌性体重显著下降,14天存活者/正常孵化幼鸟、活胚胎/设置的蛋和14天孵化幼鸟存活率/设置的蛋显著减少。氯磺隆在急性接触基础上对蜜蜂实际无毒。氯磺隆在急性暴露基础上对淡水鱼和河口/海洋鱼实际无毒,对河口/海洋无脊椎动物轻微有毒。对水生植物的毒性从实际无毒到非常高度有毒不等。氯磺隆对非目标陆生植物有毒。氯磺隆是植物细胞分裂和支链氨基酸生物合成的高效抑制剂。
IDENTIFICATION AND USE: Chlorsulfuron is a white crystalline solid. It is a selective preemergence or early postemergence herbicide used at low rates. HUMAN STUDIES: There are no data available. ANIMAL STUDIES: In 2 yr feeding trials, rats receiving 100 mg/kg diet and mice receiving 500 mg/kg diet showed no ill-effects. Developmental studies in rats demonstrated reduced maternal body weights and food consumption at 1500 mg/kg/day and decreased fetal body weights at 1500 mg/kg/day. There were no teratogenic effects. Chlorsulfuron tested negative for mutagenicity in Salmonella typhimurium bacterial strains TA98, TA100, TA1535, TA1537 treated for 48 hours with chlorsulfuron at 0, 0.001, 0.005, 0.01, 0.05, 0.1 or 0.5 ug/plate with or without metabolic activation. ECOTOXICITY STUDIES: Chlorsulfuron is practically non-toxic to birds and mammals on an acute exposure basis and is also practically nontoxic to birds on a subacute dietary exposure basis. Following chronic exposure, bobwhite quail exhibited significant reductions in female body weight, 14-day old survivors/normal hatchlings, viable embryos/eggs set, and 14-day hatchling survival/eggs set. Chlorsulfuron is also practically nontoxic to honeybees on an acute contact basis. Chlorsulfuron is practically nontoxic to both freshwater and estuarine/marine fish on an acute exposure basis and is slightly toxic to estuarine/marine invertebrates. Aquatic plant toxicity ranged from practically nontoxic to very highly toxic. Chlorsulfuron is toxic to nontarget terrestrial plants. Chlorsulfuron is a potent inhibitor of cell division and branched amino acid biosynthesis in plants.
来源:Hazardous Substances Data Bank (HSDB)