Aluminum Starch Octenylsuccinate

Aluminum starch octenylsuccinate is a modified corn starch in which octenylsuccinate groups and aluminum ions alter its surface and function. It absorbs oil, improves slip and soft-focus, boosts thickening, and aids powder flow in formulas.
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Ingredient Snapshot

Overview
Absorbs oil and blurs shine for a smooth, matte finish.
Category
Oil Control, Tone/Texture
Type
Rheology Modifier

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Cuts down visible shine and helps makeup stay put longer on oily areas. Leaves a silky, soft-touch finish that feels lightweight.

Uses In Skincare & Cosmetics

Frequently used in mattifying primers, pressed powders, and setting powders; also included in liquid foundations and sunscreens to improve feel and reduce greasiness.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Typically well tolerated, though it can be drying and may cause mild irritation in sensitive areas. Avoid inhalation of airborne powder during application.

Is Aluminum Starch Octenylsuccinate a Good Ingredient?

This rates Good: Effective at oil absorption and improving slip/mattifying feel, with a low irritation profile for most users. It is not a treatment ingredient and may feel drying on very dry or sensitive skin.

Products with Aluminum Starch Octenylsuccinate

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