An unusual C18 fatty acid with a triple bond, listed as an emollient and skin-conditioning ingredient.
What it is
Xymenynic acid is (E)-octadec-11-en-9-ynoic acid, also known as santalbic acid, a fatty acid with 18 carbon atoms containing both a double and a triple bond; it occurs in the seed oils of sandalwood and Ximenia species. CosIng lists it as an emollient and skin-conditioning ingredient.
Where it is used
Appears on the ingredient lists of a small number of products.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
The INCI name does not reveal whether it was obtained from a natural source or by synthesis.
Functions
- Skin conditioning – emollient
- Acting as lubricants on the skin surface providing the skin with a soft and smooth appearance.
- Skin conditioning
- Maintaining the skin in good condition.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.

