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STEARYL AMINOPROPYL METHICONE.

Valuable CAS 110720-64-4 / HAIR CONDITIONING, SKIN CONDITIONING - EMOLLIENT

Stearyl Aminopropyl Methicone is a sophisticated modified silicone polymer recognized for its exceptional film-forming and lubricating capabilities. It functions as a potent emollient, delivering a remarkably soft and smooth skin texture while establishing a protective, moisture-locking barrier that feels non-greasy.

Summary

Hair conditioning Skin conditioning Emollient Film-forming Lubricant Antistatic Dispersing Emulsifying

Science

Mechanism of Action

Operating as a modified silicone, this ingredient forms a microscopic, breathable film on the skin's surface. This advanced barrier is highly effective at minimizing transepidermal water loss, thus optimizing hydration. Concurrently, its inherent emollient and lubricating properties visibly soften and refine skin texture, enhancing spreadability for other actives and diminishing any greasy sensation.

Research

Clinical Evidence

Medium confidence
Effective range ≤15%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

This ingredient demonstrates robust chemical stability under typical storage and application conditions, exhibiting resistance to both oxidation and thermal degradation. While specific pH data for Stearyl Aminopropyl Methicone are not available, related compounds like Aminopropyl Dimethicone show stability across a broad pH range, suggesting comparable resilience.

Conflicts

  • Requires diligent verification of its stearyl component's origin to ensure compliance with vegan formulation standards, as it may be animal-derived.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
15%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed Stearyl Aminopropyl Methicone as safe for use in cosmetic formulations, specifically when products are formulated to be non-irritating. The panel notes that its large molecular weight makes significant skin absorption improbable. While effective as a conditioning agent up to 15%, data regarding incidental inhalation, particularly from airbrush applications, are currently insufficient. Regulatory bodies like the FDA and European Commission have approved related compounds, such as Aminopropyl Dimethicone, for cosmetic use.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Stearyl Aminopropyl Methicone stands as a valuable silicone polymer, adept at conditioning and smoothing skin by forming a protective, non-greasy barrier, with a robust safety profile up to 15% concentration.

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