代谢
每组5只Crl:CD (F-344) BR大鼠/性别,接受单次静脉注射治疗,使用(14)C标记的克洛吡氯,剂量为5 mg/kg的生理盐水,或者通过单次灌胃给予5或150 mg/kg的(14)C-克洛吡氯。另外5只大鼠/性别每天接受5 mg/kg/天的非标记克洛吡氯治疗,持续14天,随后再接受一次5 mg/kg/天的(14)C-克洛吡氯治疗。在呼出的气体中没有发现标记物。在72小时处死的组织水平要么非常低(尸体或胃),要么在几种治疗方式中无法检测到。通常,超过90%的标记物在24小时内收集的尿液中,无论给药方式如何。在粪便中发现了少量的标记物(1-5%)。对唯一可检测到的尿液中标记组分进行分析,发现这是未改变的克洛吡氯。
Groups of 5 Crl:CD (F-344) BR rats/sex were dosed with single iv treatments of (14)C-labeled clopyralid, either 5 mg/kg in saline, by single gavage doses of 5 or 150 mg/kg (14)C-clopyralid. An additional 5 rats/sex were dosed daily with 5 mg/kg/day unlabeled clopyralid for 14 days, followed by a single treatment with 5 mg/kg/day of (14)C-clopyralid. No label was found in expired air. Tissue levels at 72 hour sacrifices were either very low (carcass or stomach) or non-detectable for the several treatment regiments. Generally, over 90% of label was found in urine collected within 24 hr, regardless of administration method. Small amounts of label (1-5%) were found in feces. An analysis of the only detectable urinary labeled fraction found this to be unaltered clopyralid.
来源:Hazardous Substances Data Bank (HSDB)