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Moumoujus

Tin Oxide.

Valuable CAS 7440-31-5 / SURFACTANT - CLEANSING

Tin Oxide is a versatile inorganic compound primarily utilized in precision skincare for its aesthetic and functional properties. It efficiently reflects and diffuses light to enhance luminosity and create a soft-focus effect, minimizing the appearance of fine lines. Furthermore, it acts as a chemically inert stabilizer, helping to maintain product integrity and extend shelf life.

Summary

Abrasive Bulking agent Opacifying agent Viscosity controlling (via bulking) Pigment (for effect, pearlescent, glossy, brightening, and color travel effects) Light reflector/diffuser Stabilizer Matting agent

Science

Mechanism of Action

Tin Oxide functions multifacetedly on the skin and within formulations. Its primary aesthetic mechanism involves reflecting and diffusing light, which imparts a pearlescent or shimmering finish, boosting brightness and luminosity. This light-diffusing capability also creates a 'soft-focus' effect, optically reducing the visibility of fine lines and wrinkles. It serves as a natural matting agent to control skin shine. As a formulation aid, Tin Oxide is an opacifying and bulking agent, potentially influencing product texture and volume. Crucially, it acts as a stabilizer due to its chemical inertness, safeguarding other ingredients from external degradation and contributing to overall product longevity. It can also function as a mild abrasive and a pigment, often combined with other minerals for specific color effects.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Tin Oxide is exceptionally stable due to its chemical inertness, which is beneficial for maintaining the integrity of other formulation components and extending product shelf life by resisting external influences like light or moisture.

Synergies

  • Mica
  • Titanium Dioxide (for multi-colored or 'color travel' effects)

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
1.3%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel in 2014 determined Tin Oxide to be safe for use in cosmetic products, with concentration restrictions. It is approved for use up to 1.3% in leave-on formulations and 0.4% in rinse-off products. As a water-insoluble inorganic compound, systemic exposure through percutaneous absorption is considered unlikely, contributing to its favorable safety profile.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Tin Oxide is a valuable ingredient, prized for its ability to enhance cosmetic aesthetics through light diffusion and create a soft-focus effect, while also acting as a robust, inert stabilizer, exhibiting low irritancy and comedogenicity.

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