murphyAluminum Starch Octenylsuccinate
AKA: HYDROGEN OCTENYLBUTANEDIOATE
Synthetic
Synthetic
Not Clean
OriginDerived from corn, potato, or tapioca starch, modified with octenylsuccinic anhydride. Produced through esterification of native starch with octenylsuccinic anhydride under controlled conditions.
Aluminum Starch Octenylsuccinate is a cosmetic ingredient. Rated moderate hazard by EWG.
CAS #
9087-61-0
Form
Powder
Skin Types
●all-skin-types
Best For
General
Functions
Absorbent
Viscosity Controlling
Absorbs Excess Oil
Prevents Clumping
Controls Viscosity
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
3
CIR
Insufficient
Pregnancy
—
CIR Safety Findings
Not a Sensitizer
7 studies / 7 not sensitizing (CIR 275)
Mixed Eye Irritation Results
5 studies / 3 irritating / 2 not irritating / reactions minimal to mild (CIR 275)
Mixed Skin Irritation Results
10 studies / 4 irritating / 2 mixed / 4 not irritating / reactions slight to mild (CIR 275)
Concentration Guide
Leave-on0.087–30%
Rinse-off6.7%
0%50%100%
CIR reported use · 2018 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR