「Isononyl Isononanoate(垃圾，合成酯，虽对肌肤无刺激性，但可渗入肌肤，肌肤无法利用、代谢，只会造成垃圾堆积)」
http://tw.myblog.yahoo.com/cos-topic/article?mid=11255&prev=-1&next=11222

附帶一提的，安耐曬中非防曬劑的合成酯是Isononyl Isononanoate，它有個非常好聽的名稱「蠶絲油」，因為黏度低、滑順清爽而得名。目前為止，是相當安定(熱安定、光安定、與silicone油複配性最佳)的合成酯，在皮膚安全性的表現上也是可放心的。不是資生堂用它而已，很多護膚保養品都喜歡用這支合成酯。在一些必須動用合成酯到保養品配方的場合，這支合成酯，也是我的首選呢！
摘自张丽卿老师博客《合成酯與化學防曬劑，哪一個傷皮膚？》

Molecular Weight
284.4804
https://chem.nlm.nih.gov/chemidplus/rn/42131-25-9

Isononyl Isononanoate(垃圾，合成酯，虽对肌肤无刺激性，但可渗入肌肤，肌肤无法利用、代谢，只会造成垃圾堆积)

张丽卿https://blog.xuite.net/coschange080/twblog/121662148-%E5%8C%96%E5%A6%9D%E5%93%81%E9%85%8D%E6%96%B9%E3%80%8C%E5%AE%89%E5%85%A8%E3%80%8D%E7%9A%84%E6%A8%99%E6%BA%96%E4%BD%95%E5%9C%A8%EF%BC%9F

能洗掉吗？

◆“异壬酸酯”(Isononyl Isononanoate)是什么？3,5,5-三甲基己酸(TMHA)的历史

这个人工合成大位阻羧酸由于制备简单，性能良好，广泛用于化妆品原料等多个领域，宝拉网站上说异壬酸异壬酯这里化合物是安全的，但其实也有过敏事件的报告[8]，过敏的图就不放了，所以还是要注意这个成分。

全文和參考資料請見：https://zhuanlan.zhihu.com/p/151010787

Isononyl Isononanoate
Rating: GOOD
Categories: Emollient
Isononyl Isononanoate at a Glance
Synthetic ester that functions as an emollient skin-softening agent
Derived from the esters of nonanoic acid, which occurs naturally
Typically used in concentrations between 2–10%
Ruled safe as used in cosmetics
Isononyl Isononanoate Description
Isononyl isononanoate is a synthetic ester that functions as an emollient skin-softening agent. It is derived from the esters of nonanoic acid, a 9-carbon fatty acid which occurs naturally in cocoa oil and lavender oil (along with many other plant oils). It is typically used in cosmetics in concentrations between 2% - 10%.

The Cosmetic Ingredient Review Expert Panel has determined that isononyl isononanoate is safe in its current use and concentration in cosmetic products. It found that in concentrations of less than 12%, nonanoic acid is not a skin irritant.
Written by: Mercedes Santaella-Lam