代谢
二月桂基硫代二丙酸酯(DLTDP)、二硬脂基硫代二丙酸酯、二肉豆蔻基硫代二丙酸酯、二棕榈基硫代二丙酸酯和二十三烷基硫代二丙酸酯是它们各自醇和硫代二丙酸(TDPA)的二元酯,用于化妆品中。摄入的DLTDP以TDPA的形式从尿液中排出。单次急性口服和注射研究以及亚慢性及慢性重复剂量口服研究均未发现显著毒性。DLTDP和TDPA对动物皮肤和眼睛无刺激性,且不是致敏剂。TDPA不是致畸剂也不是生殖毒性物质。TDPA和DLTDP的遗传毒性研究为阴性。临床测试表明有轻微刺激的证据,但没有致敏或光致敏的证据。化妆品成分审查专家小组认为,来自DLTDP的数据可以合理地外推到其他二元酯,并得出结论,这些成分在配方为非刺激性的化妆品产品中是安全的。
Dilauryl thiodipropionate (DLTDP), dicetyl thiodipropionate, dimyristyl thiodipropionate, distearyl thiodipropionate, and ditridecyl thiodipropionate are dialkyl esters of their respective alcohols and thiodipropionic acid (TDPA) used in cosmetics. Ingested DLTDP was excreted in the urine as TDPA. Single-dose acute oral and parenteral studies and subchronic and chronic repeated dose oral studies did not suggest significant toxicity. Neither DLTDP nor TDPA was irritating to animal skin or eyes and they were not sensitizers. TDPA was neither a teratogen nor a reproductive toxicant. Genotoxicity studies were negative for TDPA and DLTDP. Clinical testing demonstrated some evidence of irritation but no sensitization or photosensitization. The Cosmetic Ingredient Review Expert Panel considered that the data from DLTDP reasonably may be extrapolated to the other dialkyl esters and concluded that these ingredients were safe for use in cosmetic products that are formulated to be nonirritating.
来源:Hazardous Substances Data Bank (HSDB)