Aluminum Starch Octenylsuccinate
Aluminum starch octenylsuccinate
- Role
- A modified starch that absorbs moisture and gives a drier texture.
- Catalog formulas
- 2
- Type
- Texture
- Verified
- 06.11.2026
What does this ingredient do in an antiperspirant?
It is a reaction product of starch and octenylsuccinic acid in the form of an aluminum salt. According to CosIng, it works as an absorbent, an anticaking agent and a viscosity controller.
Part of a system, not a label in isolation
In sticks and roll-ons it helps reduce the damp, sticky feel on the skin. It is not an antiperspirant active and does not reduce sweat release.
The CIR found it safe in cosmetics in 2002 and, on re-review in 2023, confirmed that conclusion for the described practices of use and concentration.
Powdery absorbents can dry the skin; this depends on the amount in the formula and the condition of the skin. The cited sources contain no specific irritation data.
Despite the word Aluminum in its name, it is not Aluminum Chlorohydrate or any other salt on the FDA M019 list: it is a modified starch used as an absorbent.
Products containing Aluminum Starch Octenylsuccinate
Links are based on the complete published INCI list for the exact product version.
Sources
The conclusions apply to the stated conditions and jurisdictions, not automatically to every concentration or product.
- COSMILE Europe (CosIng data): Aluminum Starch Octenylsuccinate Supports: function, substance identity
- CIR: Aluminum Starch Octenylsuccinate (re-review, 2023) Supports: safety assessment
- FDA OTC Monograph M019 Supports: list of active ingredients