Isononyl Isononanoate is a synthetic ester emollient used in cosmetics to impart a light, silky, non-greasy skin feel and to aid the spreadability of formulations. It functions as a base/texture ingredient rather than a treatment active.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation | Rare | Generally well tolerated; mild irritation reported infrequently in sensitive individuals. |
| Allergic contact dermatitis | Very rare | Isolated case reports; the ester is considered a low sensitizer. |
| Comedogenicity (clogged pores) | Rare | Considered low to non-comedogenic, but possible in acne-prone skin depending on formulation. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.