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Moumoujus

MAGNESIUM TRISILICATE.

Valuable CAS 14987-04-3 / ABRASIVE, ABSORBENT, ANTICAKING, BULKING, OPACIFYING, VISCOSITY CONTROLLING

Magnesium Trisilicate is a mineral-derived ingredient functioning primarily as an absorbent, efficiently managing excess oil and moisture on the skin. Its fine particulate nature also confers a mild exfoliating action, promoting a smoother skin surface.

Summary

abrasive absorbent anticaking bulking opacifying viscosity controlling

Science

Mechanism of Action

On the skin, Magnesium Trisilicate acts as a highly effective absorbent, drawing in sebum and surface moisture to create a matte, dry finish. Concurrently, its microscopic, fine texture provides a gentle physical exfoliation, aiding in the removal of superficial dead skin cells.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Commonly dusted
Red flag below
0.1%

Magnesium Trisilicate, particularly when used in powder-based formulations, may pose an incidental inhalation risk. For safety, the raw material must contain less than 0.1% crystalline silica. Data are insufficient to determine its safety for airbrush applications.

The Formula

Formulation

Solubility
Water
Optimal pH 6.3 – 9.5
0 7 14

Stability

This ingredient maintains stability within a pH range of 6.3 to 9.5, presenting as neutral to slightly alkaline in a 5% aqueous suspension. It is sensitive to decomposition by strong mineral acids and exhibits slight hygroscopic properties. In pharmaceutical contexts, it has demonstrated stability across a wide pH spectrum as an adsorbate.

Conflicts

  • Mineral acids (rapid decomposition)
  • Antimicrobial preservatives (e.g., parabens, potential inactivation)
  • Certain drugs (e.g., mebeverine hydrochloride, proguanil, norfloxacin, sucralfate, tetracycline - potential reduction in bioavailability via binding or chelation)
  • Folic acid, erythromycin stearate, paracetamol, chloroquine phosphate (potential retardation of dissolution rate via adsorption)

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The CIR Expert Panel concluded Magnesium Trisilicate is safe for cosmetic use when formulated to be non-irritating. A crucial safety consideration for products with potential incidental inhalation is ensuring the raw material contains less than 0.1% crystalline silica. Data are currently insufficient to assess its safety in airbrush applications. This ingredient also serves as an active pharmaceutical in over-the-counter antacid products.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Magnesium Trisilicate offers valuable oil absorption and gentle exfoliation benefits for specific skin types, but formulators must carefully consider its crystalline silica content for inhalation safety and potential interactions with other active ingredients.

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