代谢
TBHQ易于被代谢。在小鼠研究中,代谢主要涉及叔丁基团的氧化,随后形成葡萄糖醛酸苷结合物并通过尿液排出,或者通过粪便排出游离酸。在大鼠中,80-90%的(14)C放射性标记物在96小时内通过尿液或粪便排出,大部分以游离酸的形式存在于粪便中,少量存在于尿液中,呼出气体中的含量不到0.3%。小鼠和大鼠的尿液和粪便中存在超过43种代谢物。在几项对大鼠和狗的研究中,通过口服途径给予TBHQ显示出良好的吸收和快速排出,主要在尿液中。两种物种的主要尿液代谢物是4-O-硫酸盐结合物和4-O-葡萄糖醛酸苷。排泄在4天后似乎基本完成。
TBHQ is readily metabolized. In mouse studies, metabolism primarily involved oxidation at the tert-butyl group, followed by formation of the glucuronide conjugate and excretion in the urine, or by excretion of the free acid in feces. In rats, 80-90% of the (14)C-radiolabel was excreted in urine or feces within 96 hours, mostly as the free acid in feces with smaller amounts in urine, and less than 0.3% in expired air. More than 43 metabolites were present in the urine and feces of mice and rats. In several studies with rats and dogs, TBHQ by the oral route was shown to be well absorbed and rapidly excreted, mainly in the urine. Primary urinary metabolites in both species are the 4-O-sulfate conjugate and the 4-O-glucuronide. Excretion seems to be essentially complete after 4 days.
来源:Hazardous Substances Data Bank (HSDB)