Aluminum Stearate

Aluminum stearate is a metallic soap formed from aluminum and stearic acid, typically appearing as a fine, oil-dispersible powder. It thickens oils, stabilizes water-in-oil systems, and suspends pigments in cosmetic formulas.
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Snapshot

Overview
A texture agent that thickens oils and helps color spread evenly.
Category
Skin Conditioning
Type
Thickener

Ratings

Overall Rating

Good

Comedogenic Risk

None

Not typically evaluated for comedogenicity — no standardized rating available.

Is Aluminum Stearate a Good Ingredient?

A dependable oil-phase thickener and water-in-oil stabilizer that improves suspension and texture in balms and sticks. Rated Good due to consistent performance, formulation stability, and a long track record with generally low irritation in typical use.

Skin Benefits

Gives products a smoother, more cushioned feel and helps prevent separation over time. Helps color distribute evenly for a consistent look.

Uses in Skincare & Cosmetics

Common in balms, sticks, cream foundations, and ointments to improve body and uniformity. Also used in oil-based sunscreens and makeup to keep formulas cohesive.

Safety

Generally low irritation at standard concentrations, though a few users may notice mild dryness or sensitivity, especially on compromised skin. Avoid inhaling the dry powder during handling.