The zinc salt of undecylenic acid, used as an anticaking, antimicrobial and opacifying ingredient.
What it is
Zinc undecylenate is zinc diundec-10-enoate, the zinc salt of undecylenic acid (10-undecenoic acid), an unsaturated C11 fatty acid obtained from castor oil. CosIng lists it as an anticaking, antimicrobial and opacifying ingredient.
Where it is used
Appears on the ingredient lists of a small number of products, such as foot powders and deodorants.
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.
Two CAS numbers are listed for this ingredient; the label does not show the amount used.
Functions
- Anticaking
- Preventing agglomeration of particulate solids into lumps or hard masses (cohesive cake), thus allowing free flow of particles.
- Antimicrobial
- Preventing and/or slowing down microbial growth.
- Opacifying
- Reducing transparency or translucency of cosmetics.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.