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Moumoujus

QUATERNIUM-18 HECTORITE.

Valuable CAS 71011-27-3 / VISCOSITY CONTROLLING

Quaternium-18 Hectorite is an organically modified clay compound that functions primarily as a rheology modifier, meticulously controlling viscosity, stabilizing emulsions, and suspending insoluble particles to create optimal product textures.

Summary

viscosity controlling suspending agent emulsion stabilizer conditioning agent

Science

Mechanism of Action

This compound is formed from a positively charged quaternary ammonium group (Quaternium-18) and hectorite clay. It exhibits thixotropic properties, forming a gel-like consistency that fluidizes under shear stress (e.g., during application) and re-gels when undisturbed. The hectorite component contributes strong water absorption and swelling capacity, crucial for suspending solids and preventing oil-water phase separation. The positive charge also facilitates binding to negatively charged surfaces of skin and hair, offering conditioning benefits.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Information regarding 'dusting' of this ingredient is not available in the provided research data.

The Formula

Formulation

Solubility
Oil
Optimal pH 3 – 11
0 7 14

Stability

Quaternium-18 Hectorite demonstrates robust chemical, pH, and heat stability under typical cosmetic conditions, resisting degradation within a broad pH range of 3 to 11. Its characteristic thixotropic nature allows for controlled changes in fluidity based on mechanical stress, with the gel reforming upon cessation of disturbance.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
2%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has consistently concluded that Quaternium-18 Hectorite is safe for cosmetic use under current practices and concentrations, reaffirming this in 2001, 2013, and not reopening assessment in 2019. The Australian Industrial Chemicals Introduction Scheme (AICIS) advises a maximum concentration of 2% in dermal cosmetic products. It is specifically not recommended for use in topical products intended for the eye. A related component, bentonite clay, holds Generally Recognized as Safe (GRAS) status by the FDA as a direct food substance.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Quaternium-18 Hectorite is a valuable ingredient for enhancing formulation stability and texture, particularly in products requiring robust suspension of particles and consistent emulsion integrity across a wide pH range.

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