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Moumoujus

MAGNESIUM SODIUM FLUOROSILICATE.

Optional / ABRASIVE

Magnesium Sodium Fluorosilicate is a multifaceted ingredient functioning primarily as an abrasive exfoliant to smooth skin texture. It also serves as an absorbent to control shine, an opacifier, and a viscosity-controlling agent, capable of forming thixotropic gels in aqueous solutions.

Summary

Absorbent Abrasive Opacifying Viscosity Controlling

Science

Mechanism of Action

This compound acts principally as a physical abrasive, effectively removing dead skin cells and surface impurities to refine skin texture. Additionally, it functions as an absorbent, an opacifying agent, and a rheology modifier, thickening formulations and creating thixotropic gels at concentrations exceeding 2% in water.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH ≤5.5
0 7 14

Stability

This ingredient is stable up to 120°C. However, it can slowly react with water to form hydrofluoric acid, a highly corrosive substance. Formulations should maintain an acidic environment below pH 5.5, as fluosilicate solutions are prone to hydrolysis in alkaline conditions.

Conflicts

  • Strong acids
  • Alkalis
  • Calcium-containing compounds
  • Magnesium-containing compounds
  • Silicon-containing compounds
  • Glass

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Moderate

While generally regarded as safe for cosmetic applications, potential adverse reactions such as skin irritation, redness, dryness, or allergic responses have been observed. Information regarding its topical use during pregnancy and breastfeeding is currently unavailable. Related compounds, specifically magnesium hexafluorosilicates, can be absorbed as fluoride ions, which at elevated concentrations may contribute to fluorosis; relevant regulatory guidelines, such as Australia's 0.15% fluoride ion exemption with subsequent warnings, should be considered. The ingredient has a comedogenic rating of 1, indicating a very low likelihood of clogging pores. EWG indicates that 'Sodium Magnesium Fluorosilicate' is restricted for EWG VERIFIED products unless adequately substantiated, but may be permitted under specific conditions and warnings.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

This multi-functional ingredient offers valuable abrasive exfoliation and formulation benefits, yet its moderate irritancy risk and specific pH stability requirements necessitate careful formulation.

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